INATURALIST Observations 65379477
Santa Catarina Cuixtla, Oaxaca: 16.289871, -96.661594: : 6/21/2015: La Rata Mutante: 21 Jun 2015 :
Occurrence Remarks: No s├⌐ de qu├⌐ variedad de cascabel se trate. Huy├│ del camino y se refugi├│ a un costado, adjunto 2 tomas m├ís.; Coordinate Uncertainty in Meters: 31.00000.

INATURALIST Observations 319621555
San Vicente Lachixio, Oaxaca: 16.701551, -97.00763: : 10/7/2025: JENARO REYES MARTINEZ: 7 Oct 2025 ; Coordinate Uncertainty in Meters: 61.00000.

INATURALIST Observations 325900588
Tlacolula de Matamoros, Oaxaca: 16.947126, -96.45494: : 11/10/2025: Eugenio Padilla: 10 Nov 2025 :
Occurrence Remarks: Fotos de Manuel Silva; Coordinate Uncertainty in Meters: 226.00000.

Tlacolula de Matamoros, Oaxaca: 16.950645, -96.429078: : 11/10/2025: Eugenio Padilla: 10 Nov 2025 :
Occurrence Remarks: Fotos de Manuel Silva; Coordinate Uncertainty in Meters: 52.00000.

Occurrence Remarks: foto Victor Angel Garcia Vasquez; Coordinate Uncertainty in Meters: 4522.00000.

Unknown, Oaxaca: 17.11059, -96.695766: : 6/21/2026: Eugenio Padilla: 21 Jun 2026 ; Coordinate Uncertainty in Meters: 202.00000.

San Vicente Nunu, Oaxaca: 17.460136, -97.441203: : 8/2/2025: Jos├⌐ Luis Mendoza Betanzos: 2 Aug 2025 :
Occurrence Remarks:; Coordinate Uncertainty in Meters: 0.11000.

Heroica Ciudad de Tlaxiaco, Oaxaca: 17.268566, -97.679416: : 11/4/2023: Leticia Soriano Flores: 4 Nov 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Ixtlan de Juarez, Oaxaca: 17.316292, -96.483685: : 11/19/2025: Daniel Ram├¡rez V.: 19 Nov 2025 ; Coordinate Uncertainty in Meters: 146.00000.

Santiago Juxtlahuaca, Oaxaca: 17.334849, -98.00869: : 7/24/2016: Adriana Miranda Torres: 24 Jul 2016 ; Coordinate Uncertainty in Meters: 66042.00000.

Occurrence Remarks: Atropellada; Coordinate Uncertainty in Meters: 14.00000.

Unknown, Oaxaca: 17.43368, -97.457032: : 6/9/2026: Jos├⌐ Luis Mendoza Betanzos: 9 Jun 2026 ; Coordinate Uncertainty in Meters: 488.00000.

Cuautinchan, Puebla: 18.987497, -97.968319: : 10/24/2025: promotores_ambientales_puebla: 24 Oct 2025 ; Coordinate Uncertainty in Meters: 238.00000.

Unknown, Puebla: 18.882594, -97.738381: : 7/24/2026: Joel Erick Nava Doctor: 24 Jul 2026 ; Coordinate Uncertainty in Meters: 1510.00000.

San Juan Bautista Coixtlahuaca, Oaxaca: 17.727406, -97.320592: : 9/6/2017: RAFAEL JUAREZ LARA: 6 Sep 2017 ; Coordinate Uncertainty in Meters: 244.00000.

Unknown, Veracruz: 18.725567, -97.272881: : 4/16/2026: Enrique Nicanor: 16 Apr 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Tecali de Herrera, Puebla: 18.891578, -97.968229: : 10/16/2025: animixam: 16 Oct 2025 ; Coordinate Uncertainty in Meters: 50.00000.

Asuncion Cuyotepeji, Oaxaca: 17.952723, -97.654391: : 7/10/2018: Ricardo Rivera: 10 Jul 2018 ; Coordinate Uncertainty in Meters: 6761.00000.

Unknown, Morelos: 19.024351, -99.134865: : 2/7/2026: aguilargm: 7 Feb 2026 ; Coordinate Uncertainty in Meters: 77.00000.

Unknown, Puebla: 18.677244, -97.336572: : 5/3/2026: fernanda_alcaraz: 3 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Zapotitlan, Puebla: 18.272651, -97.486851: : 6/7/2025: zahir santillan: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Tecamachalco, Puebla: 18.87974, -97.704804: : 4/12/2022: emmasf: 12 Apr 2022 ; Coordinate Uncertainty in Meters: 198.00000.

Juchitepec, Mexico: 19.155328, -98.959437: : 6/30/2022: Ejido Santa Ana Tlacotenco, CDMX: 30 Jun 2022 :
Occurrence Remarks: Tomada por: Antonio Hern├índez; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Vibora de cascabel; Coordinate Uncertainty in Meters: 717.00000.

Tepoztlan, Morelos: 19.026442, -99.159814: : 10/2/2024: Hugo Basurto: 2 Oct 2024 ; Coordinate Uncertainty in Meters: 4.00000.

Tepoztlan, Morelos: 19.025649, -99.154744: : 3/7/2016: alelobo: 7 Mar 2016 ; Coordinate Uncertainty in Meters: 251.00000.

Santo Domingo Yanhuitlan, Oaxaca: 17.484883, -97.389296: : 4/8/2021: Miguel ├üngel Cruz Ramirez: 8 Apr 2021 ; Coordinate Uncertainty in Meters: 31.00000.

Xochimilco, Distrito Federal: 19.238426, -99.144557: : 9/1/2021: M├│nica Torres: 1 Sep 2021 ; Coordinate Uncertainty in Meters: 206.00000.

Tlalpan, Distrito Federal: 19.252777, -99.221952: : 7/7/2025: arcac-ejido-san-andres-totoltepec: 7 Jul 2025 :
Occurrence Remarks:; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Distrito Federal: 19.264035, -99.204484: : 4/25/2026: LeydyGallardo: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 207.00000.

Unknown, Distrito Federal: 19.257141, -99.202885: : 4/25/2026: nataliataverad: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 207.00000.

Occurrence Remarks: Ejemplar no manipulado encontrado a medio sendero tal y como aparece en la foto.; Coordinate Uncertainty in Meters: 162.00000.

Unknown, Distrito Federal: 19.253274, -99.192734: : 4/25/2026: octavio ondarreta: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 207.00000.

Unknown, Distrito Federal: 19.263897, -99.204526: : 4/25/2026: Karina Reyna: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 120.00000.

Unknown, Distrito Federal: 19.253453, -99.202392: : 4/25/2026: Luis ├üngel Morgado Ram├¡rez: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Distrito Federal: 19.258664, -99.196412: : 4/25/2026: paolacanche28: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 23.00000.

Unknown, Distrito Federal: 19.246572, -99.22195: : 7/15/2025: Pablo: 15 Jul 2025 ; Coordinate Uncertainty in Meters: 161.00000.

Unknown, Distrito Federal: 19.256693, -99.196974: : 4/25/2026: Marisa Swarovski: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 318.00000.

Unknown, Distrito Federal: 19.262862, -99.202306: : 4/25/2026: Sebasti├ín Muratalla: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 207.00000.

Unknown, Distrito Federal: 19.256544, -99.203328: : 2/1/2026: Kanashi Hitori: 1 Feb 2026 ; Coordinate Uncertainty in Meters: 119.00000.

Tlalpan, Distrito Federal: 19.27089, -99.204917: : 9/11/2025: Jorge Eduardo Sol├│rzano Rodr├¡guez: 11 Sep 2025 ; Coordinate Uncertainty in Meters: 81.00000.

Tlalpan, Distrito Federal: 19.273005, -99.197575: : 9/24/2025: Christian Michel Acosta Rodr├¡guez: 24 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Xochimilco, Distrito Federal: 19.261392, -99.137222: : 12/7/2025: mvz-juangonzalezromero: 7 Dec 2025 ; Coordinate Uncertainty in Meters: 12.00000.

Unknown, Distrito Federal: 19.263375, -99.182306: : 6/8/2026: Ana Smith: 8 Jun 2026 ; Coordinate Uncertainty in Meters: 24.00000.

Tlalpan, Distrito Federal: 19.295113, -99.203003: : 5/19/2023: Carlos Gonzalez Villalobos: 19 May 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Tlalpan, Distrito Federal: 19.295406, -99.202032: : 5/19/2023: Carlos Gonzalez Villalobos: 19 May 2023 ; Coordinate Uncertainty in Meters: 218.00000.

Tlalpan, Distrito Federal: 19.291304, -99.206562: : 9/27/2018: J Alejandro Gonz├ílez Castillo: 27 Sep 2018 ; Coordinate Uncertainty in Meters: 125.00000.

Occurrence Remarks: juvenil.; Coordinate Uncertainty in Meters: 244.00000.

Tlalpan, Distrito Federal: 19.240002, -99.203165: : 5/29/2020: Mario Casta├▒eda: 29 May 2020 ; Coordinate Uncertainty in Meters: 125.00000.

Tlalpan, Distrito Federal: 19.250256, -99.189808: : 7/7/2020: Germ├ín: 7 Jul 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Bosque de pino-encino, aproximadamente 1.5 m de longitud; Coordinate Uncertainty in Meters: 831.00000.

Tlalpan, Distrito Federal: 19.268893, -99.197133: : 5/21/2021: Carlos Gonzalez Villalobos: 21 May 2021 ; Coordinate Uncertainty in Meters: 425.00000.

Tlalpan, Distrito Federal: 19.263608, -99.204337: : 5/2/2021: Carlos Gonzalez Villalobos: 2 May 2021 :
Occurrence Remarks: Juvenil encontrado en construcciones humanas al inicio de las primeras lluvias.; Coordinate Uncertainty in Meters: 202.00000.

Tlalpan, Distrito Federal: 19.248634, -99.205763: : 6/7/2025: Anayeli GE: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 7240.00000.

1309; Coordinate Uncertainty in Meters: 7.00000.

Unknown, Distrito Federal: 19.563113, -99.10994: : 5/27/2026: Arturo: 27 May 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Distrito Federal: 19.571632, -99.11668: : 5/20/2026: Arturo: 20 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Distrito Federal: 19.560581, -99.115438: : 4/24/2026: Eduardo: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 15.00000.

Unknown, Distrito Federal: 19.568881, -99.115695: : 4/25/2026: Fernanda Perez: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Distrito Federal: 19.561432, -99.115556: : 4/24/2026: Jos├⌐ Rodolfo Cid Beziez: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Distrito Federal: 19.572814, -99.118622: : 5/20/2026: jorge root: 20 May 2026 ; Coordinate Uncertainty in Meters: 236.00000.

Unknown, Distrito Federal: 19.452472, -99.097445: : 5/27/2026: Hanji Eduardo Alegr├¡a Ovando: 27 May 2026 ; Coordinate Uncertainty in Meters: 30562.00000.

1309; Coordinate Uncertainty in Meters: 21.00000.

Unknown, Mexico: 19.603866, -99.099023: : 5/31/2026: Erick,Montalvo: 31 May 2026 ; Coordinate Uncertainty in Meters: 62.00000.

Unknown, Michoacan: 19.565827, -101.616296: : 2/20/2026: SIRUKI EDUCACI├ôN AMBIENTAL A.C.: 20 Feb 2026 ; Coordinate Uncertainty in Meters: 1590.00000.

Unknown, Distrito Federal: 19.562572, -99.12118: : 2/26/2026: Eduardo: 26 Feb 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Distrito Federal: 19.561433, -99.115661: : 4/24/2026: Carmen Guerrero: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Distrito Federal: 19.561388, -99.115612: : 4/24/2026: Carmen Guerrero: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Tlalnepantla de Baz, Mexico: 19.571424, -99.151062: : 8/15/2022: Gabino: 15 Aug 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Distrito Federal: 19.568807, -99.115268: : 4/25/2026: Adalberto Perez: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Iztapalapa, Distrito Federal: 19.333039, -98.984031: : 9/25/2025: Antonio Ruiz Hern├índez: 25 Sep 2025 ; Coordinate Uncertainty in Meters: 11.00000.

Ecatepec de Morelos, Mexico: 19.591484, -99.080658: : 10/4/2025: John Zenil: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Coacalco de Berriozabal, Mexico: 19.612345, -99.121108: : 12/7/2025: misael1337: 7 Dec 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Tlalnepantla de Baz, Mexico: 19.567753, -99.158431: : 4/30/2022: Veredeando Sierra de Guadalupe: 30 Apr 2022 :
Occurrence Remarks: Γùï .Moguel D.P; Coordinate Uncertainty in Meters: 95.00000.

Ecatepec de Morelos, Mexico: 19.589382, -99.091803: : 3/19/2021: Veredeando Sierra de Guadalupe: 19 Mar 2021 ; Coordinate Uncertainty in Meters: 106.00000.

Tultitlan, Mexico: 19.61449, -99.131625: : 2/8/2022: Veredeando Sierra de Guadalupe: 8 Feb 2022 ; Coordinate Uncertainty in Meters: 5.00000.

Coyoacan, Distrito Federal: 19.319622, -99.193539: : 6/22/2022: kevobarry: 22 Jun 2022 ; Coordinate Uncertainty in Meters: 206.00000.

Ecatepec de Morelos, Mexico: 19.587877, -99.116127: : 6/25/2022: zentlapal: 25 Jun 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Coyoacan, Distrito Federal: 19.318689, -99.183119: : 6/28/2022: Eric Centenero Alcal├í: 28 Jun 2022 ; Coordinate Uncertainty in Meters: 1500.00000.

Acuitzio, Michoacan: 19.484503, -101.35996: : 7/9/2022: Dulce R├¡os: 9 Jul 2022 ; Coordinate Uncertainty in Meters: 15.00000.

Coyoacan, Distrito Federal: 19.317939, -99.194804: : 9/13/2022: Julio Segundo: 13 Sep 2022 ; Coordinate Uncertainty in Meters: 63.00000.

Nicolas Romero, Mexico: 19.601691, -99.387223: : 10/8/2022: Jes├║s Ju├írez Reyes: 8 Oct 2022 ; Coordinate Uncertainty in Meters: 30545.00000.

Iztapalapa, Distrito Federal: 19.333126, -98.983719: : 10/11/2022: Yoli: 11 Oct 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Coyoacan, Distrito Federal: 19.317509, -99.196796: : 10/27/2022: Carlos Roberto Galaviz S├ínchez: 27 Oct 2022 ; Coordinate Uncertainty in Meters: 8.00000.

Ecatepec de Morelos, Mexico: 19.589343, -99.060917: : 11/2/2022: Octavio Calder├│n: 2 Nov 2022 ; Coordinate Uncertainty in Meters: 96.00000.

Coacalco de Berriozabal, Mexico: 19.604219, -99.093468: : 4/23/2023: Pyros: 23 Apr 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Tlahuac, Distrito Federal: 19.319803, -98.996997: : 5/13/2023: Maricruz Torralba Zopiyactle: 13 May 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Me asusto :(; Coordinate Uncertainty in Meters: 39.00000.

Coacalco de Berriozabal, Mexico: 19.591259, -99.110284: : 7/9/2023: Irving Rojas Velasco: 9 Jul 2023 ; Coordinate Uncertainty in Meters: 3376.00000.

Occurrence Remarks: Especie adulta con 6 cascabeles.; Coordinate Uncertainty in Meters: 33.00000.

Occurrence Remarks: Se encontraba entre rocas a una altura media de una monta├▒a; Coordinate Uncertainty in Meters: 238.00000.

Coyoacan, Distrito Federal: 19.318356, -99.193354: : 9/6/2013: C. Emiliano Villarreal-de Casas: 6 Sep 2013 :
Occurrence Remarks: I was walking near by a pond and I hear it, so i turned and took photos of it.; Coordinate Uncertainty in Meters: 12.00000.

Coyoacan, Distrito Federal: 19.315966, -99.184199: : 9/19/2024: Arturo Crespo Moctezuma: 19 Sep 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Coyoacan, Distrito Federal: 19.315889, -99.184057: : 9/19/2024: Octavio P├⌐rez-Mart├¡nez: 19 Sep 2024 ; Coordinate Uncertainty in Meters: 30.00000.

Ecatepec de Morelos, Mexico: 19.590986, -99.086723: : 4/2/2023: Rodrigo Hernandez buend├¡a: 2 Apr 2023 ; Coordinate Uncertainty in Meters: 253.00000.

Occurrence Remarks: Evit├│ la ubicaci├│n por esos herbalistas curanderos que creen que cura el c├íncer busquenla en la casa de su suegra.; Coordinate Uncertainty in Meters: 581.00000.

Coacalco de Berriozabal, Mexico: 19.612808, -99.114787: : 8/15/2020: Francisco Xavier Delgado Moreno: 15 Aug 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Gustavo A. Madero, Distrito Federal: 19.569025, -99.122332: : 7/15/2008: sierra de Guadalupe y la Armella: 15 Jul 2008 ; Coordinate Uncertainty in Meters: 8.00000.

Acuitzio, Michoacan: 19.485837, -101.361593: : 6/10/2021: Dulce R├¡os: 10 Jun 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Uruapan, Michoacan: 19.458705, -102.047017: : 7/10/2021: Manuel Nicol├ís Madrigal P├⌐rez: 10 Jul 2021 ; Coordinate Uncertainty in Meters: 107.00000.

Uruapan, Michoacan: 19.489989, -102.006905: : 9/22/2014: David Ru├¡z Dom├¡nguez: 22 Sep 2014 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Encontrado tomando el sol sobre las rocas; Coordinate Uncertainty in Meters: 886.00000.

Valle de Chalco Solidaridad, Mexico: 19.317406, -98.959208: : 9/27/2025: Maricruz Torralba Zopiyactle: 27 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Acuitzio, Michoacan: 19.486961, -101.358513: : 8/12/2023: Ana M Flores: 12 Aug 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Mexico: 19.611284, -99.119921: : 7/4/2026: Francisco Xavier Delgado Moreno: 4 Jul 2026 ; Coordinate Uncertainty in Meters: 31.00000.

Acuitzio, Michoacan: 19.487519, -101.359182: : 8/23/2025: Juan Ma Contortrix: 23 Aug 2025 ; Coordinate Uncertainty in Meters: 123.00000.

Coacalco de Berriozabal, Mexico: 19.615014, -99.11301: : 5/9/2022: Veredeando Sierra de Guadalupe: 9 May 2022 ; Coordinate Uncertainty in Meters: 277.00000.

Unknown, Distrito Federal: 19.561432, -99.11553: : 4/24/2026: Arturo: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Acuitzio, Michoacan: 19.486864, -101.358529: : 8/23/2025: betorquato: 23 Aug 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Distrito Federal: 19.334077, -98.974527: : 7/1/2026: dioney_tellez: 1 Jul 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Unknown, Distrito Federal: 19.318206, -99.192787: : 12/3/2025: macortes: 3 Dec 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Uruapan, Michoacan: 19.424988, -102.090205: : 8/20/2025: Brandon Gabriel: 20 Aug 2025 ; Coordinate Uncertainty in Meters: 378.00000.

Unknown, Mexico: 19.595663, -99.08509: : 7/18/2026: John Zenil: 18 Jul 2026 ; Coordinate Uncertainty in Meters: 244.00000.

Occurrence Remarks: Occurrence Remarks: La encontr├⌐ atropellada; Coordinate Uncertainty in Meters: 190.00000.

Teul de Gonzalez Ortega, Jalisco: 21.424853, -103.46759: : 7/27/2025: Leonardo M. Mart├¡nez-Campos: 27 Jul 2025 :

San Miguel de Allende, Guanajuato: 20.832533, -100.7046: : 8/2/2025: Damian Chalvignac: 2 Aug 2025 :

Tultitlan, Mexico: 19.617104, -99.129303: : 8/8/2025: Francisco Xavier Delgado Moreno: 8 Aug 2025 :

Tultitlan, Mexico: 19.616695, -99.129294: : 8/8/2025: Francisco Xavier Delgado Moreno: 8 Aug 2025 :

El Marques, Queretaro: 20.672322, -100.320738: : 10/27/2025: Brandon Rivera Corona: 27 Oct 2025 ; Coordinate Uncertainty in Meters: 24.00000.

5203; Coordinate Uncertainty in Meters: 100.00000.

El Marques, Queretaro: 20.613579, -100.324828: : 8/13/2025: yael_arce: 13 Aug 2025 ; Coordinate Uncertainty in Meters: 1757.00000.

Queretaro, Queretaro: 20.808103, -100.534294: : 11/30/2025: Jos├⌐ Arturo Morales Tirado: 30 Nov 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Guanajuato, Guanajuato: 20.991111, -101.226111: : 12/1/2025: mayazamorano99: 1 Dec 2025 ; Coordinate Uncertainty in Meters: 630.00000.

Unknown, Guanajuato: 20.215033, -100.641116: : 7/25/2026: Walter Perea: 25 Jul 2026 ; Coordinate Uncertainty in Meters: 1047.00000.

Unknown, Hidalgo: 20.085246, -99.39407: : 4/24/2026: Kevin Meza: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 262.00000.

Unknown, Michoacan: 19.820158, -101.478058: : 5/5/2026: Jose Manuel Vazquez Garcia: 5 May 2026 ; Coordinate Uncertainty in Meters: 31.00000.

Unknown, Michoacan: 19.693351, -101.13938: : 5/23/2026: alfredomontero1: 23 May 2026 ; Coordinate Uncertainty in Meters: 123.00000.

Occurrence Remarks: Habitantes la mataron desafortunadamente; Coordinate Uncertainty in Meters: 1576.00000.

Unknown, Queretaro: 20.781281, -100.050967: : 5/24/2026: Jennifer L. Brandt: 24 May 2026 ; Coordinate Uncertainty in Meters: 1883.00000.

Unknown, Hidalgo: 20.729142, -99.33074: : 2/25/2026: lalombrises: 25 Feb 2026 ; Coordinate Uncertainty in Meters: 7.00000.

Unknown, Guanajuato: 20.560582, -101.651262: : 2/28/2026: ElSenderoDeMike: 28 Feb 2026 ; Coordinate Uncertainty in Meters: 1977.00000.

Unknown, Guanajuato: 21.19602, -100.385537: : 2/20/2026: Maite Marmolejo: 20 Feb 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Unknown, Guanajuato: 21.193958, -100.447673: : 3/1/2026: Ariana Cobos: 1 Mar 2026 ; Coordinate Uncertainty in Meters: 389.00000.

Unknown, Guanajuato: 21.146595, -100.33824: : 3/6/2026: Marisol Ramirez: 6 Mar 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Unknown, Guanajuato: 20.866346, -100.745038: : 3/12/2026: brameikelboom: 12 Mar 2026 ; Coordinate Uncertainty in Meters: 58.00000.

Unknown, Zacatecas: 21.373606, -103.209392: : 8/29/2025: Roberto L├│pez: 29 Aug 2025 ; Coordinate Uncertainty in Meters: 30396.00000.

Zinapecuaro, Michoacan: 19.91398, -100.606619: : 10/27/2025: karyfer: 27 Oct 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Occurrence Remarks: subsp. nigrescens (?) Video en ig: pelosdegatow; Coordinate Uncertainty in Meters: 60.00000.

Nochistlan de Mejia, Zacatecas: 21.3343, -102.976075: : 4/12/2023: Zabdiel Cervantes: 12 Apr 2023 :
Occurrence Remarks: Mi primera observaci├│n de un Cr├│talo, casi mor├¡ de la emoci├│n al verla!; Coordinate Uncertainty in Meters: 10.00000.

Occurrence Remarks: Did not rattle even when approached very closely; Coordinate Uncertainty in Meters: 364.00000.

Occurrence Remarks: Small and had some green coloration; Coordinate Uncertainty in Meters: 420.00000.

Nochistlan de Mejia, Zacatecas: 21.603739, -102.783289: : 5/19/2024: Ra├║l Peralta Pardo: 19 May 2024 ; Coordinate Uncertainty in Meters: 15.00000.

Nochistlan de Mejia, Zacatecas: 21.330603, -102.960635: : 2/9/2025: Zabdiel Cervantes: 9 Feb 2025 :
Occurrence Remarks: Un ejemplar que tuve la oportunidad de reubicar, chulada de especie!; Coordinate Uncertainty in Meters: 25.00000.

Tierra Nueva, San Luis Potosi: 21.56281, -100.459859: : 12/14/2016: Monitoreo comunitario San Ant├│n de los Mart├¡nez: 14 Dec 2016 ; Coordinate Uncertainty in Meters: 2026.00000.

Tlaltenango de Sanchez Roman, Zacatecas: 21.701861, -103.139507: : 8/12/2021: Iv├ín Zurita: 12 Aug 2021 ; Coordinate Uncertainty in Meters: 2016.00000.

Unknown, Queretaro: 20.522509, -100.38918: : 1/1/2026: Coronado Govaerts: 1 Jan 2026 ; Coordinate Uncertainty in Meters: 61.00000.

Unknown, Michoacan: 19.632749, -101.21788: : 2/7/2026: Guillermo Huerta Ramos: 7 Feb 2026 ; Coordinate Uncertainty in Meters: 116.00000.

Unknown, Guanajuato: 21.371896, -101.643305: : 4/24/2026: Eduardo Gutierrez: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 27.00000.

Unknown, Guanajuato: 20.445402, -101.783297: : 4/18/2026: Roger OMuircheartaigh: 18 Apr 2026 ; Coordinate Uncertainty in Meters: 30472.00000.

Acambaro, Guanajuato: 20.048658, -100.675074: : 9/20/2025: Oscar Alejandro Morales Ju├írez: 20 Sep 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Queretaro: 20.081879, -99.965803: : 4/5/2026: dianabios: 5 Apr 2026 ; Coordinate Uncertainty in Meters: 1127.00000.

Unknown, Guanajuato: 21.339243, -100.353671: : 4/4/2026: Guardianes de la Reserva: 4 Apr 2026 ; Coordinate Uncertainty in Meters: 634.00000.

San Felipe, Guanajuato: 21.261695, -101.254237: : 10/5/2025: ElSenderoDeMike: 5 Oct 2025 ; Coordinate Uncertainty in Meters: 2.00000.

El Marques, Queretaro: 20.68007, -100.333442: : 12/27/2025: sserranoh: 27 Dec 2025 ; Coordinate Uncertainty in Meters: 1134.00000.

Unknown, Jalisco: 20.743057, -102.652049: : 6/2/2026: Azael C Garc├¡a: 2 Jun 2026 ; Coordinate Uncertainty in Meters: 91.00000.

Unknown, Hidalgo: 20.079686, -99.39007: : 6/6/2026: Kevin Meza: 6 Jun 2026 ; Coordinate Uncertainty in Meters: 74.00000.

Unknown, Aguascalientes: 21.747925, -102.740381: : 6/10/2026: straarup: 10 Jun 2026 ; Coordinate Uncertainty in Meters: 1100.00000.

Unknown, Guanajuato: 20.349785, -100.964736: : 6/13/2026: Jonathan P├⌐rez Cu├⌐llar: 13 Jun 2026 ; Coordinate Uncertainty in Meters: 724.00000.

Tepotzotlan, Mexico: 19.767096, -99.340525: : 6/27/2021: Alma_Coatlicue: 27 Jun 2021 ; Coordinate Uncertainty in Meters: 228.00000.

Silao de la Victoria, Guanajuato: 21.012, -101.369: : 10/23/2021: Benjamin Ruiz: 23 Oct 2021 :
Occurrence Remarks: descubierta muerta; Coordinate Uncertainty in Meters: 2025.00000.

Guanajuato, Guanajuato: 21.017689, -101.244308: : 6/18/2022: Lavinia Lav├¡n: 18 Jun 2022 ; Coordinate Uncertainty in Meters: 6.00000.

Occurrence Remarks: En selva baja caducifolia; Coordinate Uncertainty in Meters: 115.00000.

Nextlalpan, Mexico: 19.747816, -99.065793: : 6/22/2022: Veredeando Sierra de Guadalupe: 22 Jun 2022 ; Coordinate Uncertainty in Meters: 30545.00000.

Guanajuato, Guanajuato: 21.06377, -101.223973: : 9/4/2022: Conpi B H: 4 Sep 2022 ; Coordinate Uncertainty in Meters: 2.00000.

Huasca de Ocampo, Hidalgo: 20.254353, -98.55011: : 4/1/2023: Mireya Gonz├ílez: 1 Apr 2023 ; Coordinate Uncertainty in Meters: 28.00000.

Ojuelos de Jalisco, Jalisco: 21.838516, -101.817209: : 8/14/2018: Kevin Meza: 14 Aug 2018 ; Coordinate Uncertainty in Meters: 2013.00000.

Occurrence Remarks: muerta; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: About 90cm long.; Coordinate Uncertainty in Meters: 3101.00000.

Zacapu, Michoacan: 19.82299, -101.82924: : 9/20/2018: Daniel GE: 20 Sep 2018 ; Coordinate Uncertainty in Meters: 624.00000.

Occurrence Remarks: Aproximadamente 1 metro de largo; Coordinate Uncertainty in Meters: 200.00000.

Occurrence Remarks: Sin vida; Coordinate Uncertainty in Meters: 0.11000.

Lagos de Moreno, Jalisco: 21.33957, -101.981093: : 10/28/2023: Cristina: 28 Oct 2023 ; Coordinate Uncertainty in Meters: 948.00000.

Xichu, Guanajuato: 21.193363, -99.925609: : 7/8/2023: cesar_pozos: 8 Jul 2023 ; Coordinate Uncertainty in Meters: 288.00000.

San Diego de la Union, Guanajuato: 21.449866, -100.983688: : 10/12/2023: cesar_pozos: 12 Oct 2023 ; Coordinate Uncertainty in Meters: 302.00000.

San Felipe, Guanajuato: 21.593483, -101.134065: : 10/29/2023: cesar_pozos: 29 Oct 2023 ; Coordinate Uncertainty in Meters: 87.00000.

Aguascalientes, Aguascalientes: 21.804082, -102.526898: : 12/2/2023: Rafael Huerta Cu├⌐llar: 2 Dec 2023 :
Occurrence Remarks: Serpiente muerta encontrada en el potrero; Coordinate Uncertainty in Meters: 1131.00000.

Jerecuaro, Guanajuato: 20.323389, -100.407958: : 9/7/2024: pablo_fraar: 7 Sep 2024 ; Coordinate Uncertainty in Meters: 10.00000.

Atarjea, Guanajuato: 21.358924, -99.818125: : 12/16/2024: Chabelo Atarjea: 16 Dec 2024 ; Coordinate Uncertainty in Meters: 354.00000.

Occurrence Remarks: Dormida; Coordinate Uncertainty in Meters: 982.00000.

San Jose Iturbide, Guanajuato: 20.995445, -100.316708: : 8/9/2022: DIEGO MONTES: 9 Aug 2022 ; Coordinate Uncertainty in Meters: 279.00000.

Queretaro, Queretaro: 20.528744, -100.366692: : 8/23/2019: arturovega: 23 Aug 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Cadereyta de Montes, Queretaro: 20.684858, -99.804931: : 11/5/2019: Opuntia Cadereytensis: 5 Nov 2019 ; Coordinate Uncertainty in Meters: 2.00000.

Acatlan, Hidalgo: 20.212929, -98.421456: : 4/9/2020: Luis Enrique Gonz├ílez-Solano: 9 Apr 2020 :
Occurrence Remarks: Aprox. 70 cm.; Coordinate Uncertainty in Meters: 30490.00000.

Celaya, Guanajuato: 20.652631, -100.679486: : 5/31/2020: nachosalda├▒a: 31 May 2020 ; Coordinate Uncertainty in Meters: 15.00000.

Occurrence Remarks: Una serpiente muy bella, sabia por otras personas que hab├¡a en esa zona pero nunca habia visto una, en vista de que la vi muy alterada no quise moverle mucho para tomar mejores angulos.; Coordinate Uncertainty in Meters: 358.00000.

Zinapecuaro, Michoacan: 19.865288, -100.816612: : 7/23/2020: ericgonzalez4: 23 Jul 2020 ; Coordinate Uncertainty in Meters: 13.00000.

Erongaricuaro, Michoacan: 19.671589, -101.6649: : 12/21/2018: Ad├ín: 21 Dec 2018 ; Coordinate Uncertainty in Meters: 897.00000.

Manuel Doblado, Guanajuato: 20.661596, -101.859413: : 9/14/2020: Eugenia - Tutor: 14 Sep 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Guanajuato, Guanajuato: 21.068356, -101.136981: : 9/24/2020: Juan Carlos Fonseca Mata: 24 Sep 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Queretaro, Queretaro: 20.701624, -100.431471: : 9/26/2020: Cristhian Alejandro Peralta-Robles: 26 Sep 2020 ; Coordinate Uncertainty in Meters: 8.00000.

Quiroga, Michoacan: 19.67305, -101.665042: : 12/22/2018: David Ru├¡z Dom├¡nguez: 22 Dec 2018 ; Coordinate Uncertainty in Meters: 4.00000.

Zacualtipan de angeles, Hidalgo: 20.635101, -98.694779: : 8/6/2020: Francisco Mart├¡nez P├⌐rez: 6 Aug 2020 ; Coordinate Uncertainty in Meters: 1133.00000.

Lagos de Moreno, Jalisco: 21.285566, -101.712556: : 5/16/2021: Jos├⌐ Ram├│n Neri: 16 May 2021 ; Coordinate Uncertainty in Meters: 3.00000.

Tequisquiapan, Queretaro: 20.529861, -99.95403: : 9/19/2025: J. G. Loza-Le├│n: 19 Sep 2025 ; Coordinate Uncertainty in Meters: 315.00000.

Unknown, Mexico: 19.762963, -99.26566: : 6/12/2026: Jorge Eduardo Torres Su├írez: 12 Jun 2026 ; Coordinate Uncertainty in Meters: 206.00000.

Unknown, Hidalgo: 20.486568, -99.579171: : 7/20/2026: feryanezch05: 20 Jul 2026 ; Coordinate Uncertainty in Meters: 255.00000.

Unknown, Mexico: 19.617515, -99.113111: : 7/11/2026: David Dorantes Baeza: 11 Jul 2026 ; Coordinate Uncertainty in Meters: 377.00000.

Unknown, Hidalgo: 20.65409, -99.289709: : 6/20/2026: vladimir_gonzalez_lopez: 20 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Guanajuato: 21.375825, -99.813411: : 7/1/2026: Edgar Pedro M├⌐ndez V├ízquez: 1 Jul 2026

Occurrence Remarks: 2 ejemplares

Unknown, Michoacan: 19.669434, -101.162922: : 6/27/2026: Juan Ma Contortrix: 27 Jun 2026 ; Coordinate Uncertainty in Meters: 12.00000.

Calvillo, Aguascalientes: 21.719668, -102.727926: : 10/11/2025: Pablo Adolfo Gonz├ílez Enr├¡quez: 11 Oct 2025 ; Coordinate Uncertainty in Meters: 145.00000.

San Juan del Rio, Queretaro: 20.343333, -100.144722: : 9/26/2025: Daniel_Aguilar: 26 Sep 2025 ; Coordinate Uncertainty in Meters: 3738.00000.

Tequixquiac, Mexico: 19.905339, -99.172437: : 10/11/2025: Angel Estrada: 11 Oct 2025 ; Coordinate Uncertainty in Meters: 19.00000.

Nochistlan de Mejia, Zacatecas: 21.598216, -102.777091: : 8/5/2024: Ra├║l Peralta Pardo: 5 Aug 2024 ; Coordinate Uncertainty in Meters: 4.00000.

San Felipe, Guanajuato: 21.686244, -101.188192: : 2/3/2021: Victor Solis: 3 Feb 2021 ; Coordinate Uncertainty in Meters: 1333.00000.

San Felipe, Guanajuato: 21.744832, -101.349941: : 9/10/2025: xgot: 10 Sep 2025 ; Coordinate Uncertainty in Meters: 2542.00000.

Nochistlan de Mejia, Zacatecas: 21.595954, -102.782241: : 4/18/2024: Ra├║l Peralta Pardo: 18 Apr 2024 ; Coordinate Uncertainty in Meters: 28.00000.

Acambaro, Guanajuato: 20.035669, -100.62551: : 8/20/2025: Oscar Alejandro Morales Ju├írez: 20 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Atarjea, Guanajuato: 21.192158, -99.821432: : 8/21/2025: ecag: 21 Aug 2025 ; Coordinate Uncertainty in Meters: 265.00000.

Chignautla, Puebla: 19.703875, -97.496913: : 9/15/2020: Manuel Cortina: 15 Sep 2020 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Hidalgo: 20.656959, -99.289787: : 7/5/2026: vladimir_gonzalez_lopez: 5 Jul 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Queretaro, Queretaro: 20.855432, -100.37416: : 9/4/2025: Aldo Garc├¡a: 4 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Tequixquiac, Mexico: 19.894442, -99.178286: : 9/6/2025: Angel Estrada: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Encarnacion de Diaz, Jalisco: 21.522588, -102.138859: : 9/7/2025: betorquato: 7 Sep 2025 ; Coordinate Uncertainty in Meters: 2.00000.

El Marques, Queretaro: 20.68095, -100.332949: : 7/6/2021: Sathya: 6 Jul 2021 ; Coordinate Uncertainty in Meters: 3523.00000.

Unknown, Guanajuato: 20.199763, -100.678472: : 7/15/2026: Oscar Alejandro Morales Ju├írez: 15 Jul 2026 ; Coordinate Uncertainty in Meters: 3718.00000.

Unknown, Queretaro: 20.685668, -99.802464: : 7/16/2026: Jos├⌐ Belem Hern├índez D├¡az: 16 Jul 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Nopala de Villagran, Hidalgo: 20.226747, -99.756908: : 10/16/2025: German Flora Polo: 16 Oct 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Jesus Maria, Aguascalientes: 21.954536, -102.339587: : 10/13/2022: Niza Mariana: 13 Oct 2022 ; Coordinate Uncertainty in Meters: 248.00000.

Occurrence Remarks: Occurrence Remarks: Por el frio las v├¡boras cascabel se enroscan y no son tan hostiles, durante el d├¡a pueden salir buscando calor lo cual si hace que sean hostiles, generalmente la gente cree que los anillos en el cascabel indican su edad pero esto es falso ya que se forman con cada muda de piel y mudan de piel varias veces al a├▒o lo cual solo puede hacer que se de una idea de su edad aproximada pero no exacta.; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Occurrence Remarks: Mismo ejemplar de la observaci├│n de Leonardo Ponce, un juvenil con una coloraci├│n peculiar y rara de ver.; Coordinate Uncertainty in Meters: 30338.00000.

Occurrence Remarks: Occurrence Remarks: Machos en combate; Coordinate Uncertainty in Meters: 12.00000.

Occurrence Remarks: Occurrence Remarks: En combate ritual; Coordinate Uncertainty in Meters: 742.00000.

Occurrence Remarks: Occurrence Remarks: Macho; Coordinate Uncertainty in Meters: 4791.00000.

Occurrence Remarks: Occurrence Remarks: PROREST/0640; Coordinate Uncertainty in Meters: 488.00000.

Occurrence Remarks: Occurrence Remarks: PROREST/0640; Coordinate Uncertainty in Meters: 122.00000.

Occurrence Remarks: Copulating?; Coordinate Uncertainty in Meters: 13.00000.

Zacatecas, Zacatecas: 22.772791, -102.576571: : 10/30/2025: Grecia Ramos: 30 Oct 2025 ; Coordinate Uncertainty in Meters: 4236.00000.

San Dimas, Durango: 24.446228, -106.119033: : 8/19/2025: Osmar Diaz: 19 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Zacatecas: 23.468784, -103.874401: : 7/25/2026: Omar Salvador Vega E.: 25 Jul 2026 ; Coordinate Uncertainty in Meters: 1493.00000.

Unknown, Zacatecas: 23.469706, -103.876288: : 7/25/2026: Omar Salvador Vega E.: 25 Jul 2026 ; Coordinate Uncertainty in Meters: 244.00000.

Unknown, Zacatecas: 23.469942, -103.878004: : 7/25/2026: Omar Salvador Vega E.: 25 Jul 2026 ; Coordinate Uncertainty in Meters: 244.00000.

Sombrerete, Zacatecas: 23.789673, -103.791156: : 10/12/2025: Israel Mijares: 12 Oct 2025 ; Coordinate Uncertainty in Meters: 20.00000.

Charcas, San Luis Potosi: 23.165724, -100.946763: : 6/2/2025: estherzavala: 2 Jun 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Aguascalientes: 21.865345, -102.402173: : 7/24/2026: Bruno Valente: 24 Jul 2026 ; Coordinate Uncertainty in Meters: 30338.00000.

Unknown, Aguascalientes: 21.868079, -102.451957: : 7/10/2026: Bruno Valente: 10 Jul 2026 ; Coordinate Uncertainty in Meters: 30338.00000.

Pueblo Nuevo, Durango: 23.299183, -105.003265: : 8/13/2021: angel salinas: 13 Aug 2021 ; Coordinate Uncertainty in Meters: 4.00000.

Durango, Durango: 23.849242, -105.013786: : 8/18/2021: angel salinas: 18 Aug 2021 ; Coordinate Uncertainty in Meters: 3.00000.

Mexquitic de Carmona, San Luis Potosi: 22.162264, -101.297399: : 12/1/2024: Josema: 1 Dec 2024 ; Coordinate Uncertainty in Meters: 21738.00000.

Durango, Durango: 24.004943, -104.824319: : 5/12/2015: manuelmcb: 12 May 2015 ; Coordinate Uncertainty in Meters: 2.00000.

Durango, Durango: 23.8923, -105.025104: : 9/28/2023: Alberto Rodr├¡guez Maturino: 28 Sep 2023 ; Coordinate Uncertainty in Meters: 11.10000.

Durango, Durango: 23.897779, -105.157143: : 9/17/2021: Hugo van Vliet: 17 Sep 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Suchil, Durango: 23.397192, -104.26658: : 10/17/2024: Jos├⌐ Candelario Hern├índez Alvarez: 17 Oct 2024 ; Coordinate Uncertainty in Meters: 61.00000.

Durango, Durango: 23.56844, -104.722017: : 8/30/2021: Heriberto ├üvila-Gonz├ílez: 30 Aug 2021 ; Coordinate Uncertainty in Meters: 8.00000.

Occurrence Remarks: Cascabel; Coordinate Uncertainty in Meters: 714.00000.

Occurrence Remarks: Ayuda con identificaci├│n; Coordinate Uncertainty in Meters: 5.00000.

Fresnillo, Zacatecas: 23.155467, -102.86998: : 3/10/2023: Diana Monserrath: 10 Mar 2023 ; Coordinate Uncertainty in Meters: 237.00000.

Monte Escobedo, Zacatecas: 22.309779, -103.631781: : 5/5/2022: jose gutierrez: 5 May 2022 ; Coordinate Uncertainty in Meters: 61.00000.

Zaragoza, San Luis Potosi: 22.072265, -100.61504: : 5/21/2023: denisegonzalez: 21 May 2023 ; Coordinate Uncertainty in Meters: 1326.00000.

Unknown, Zacatecas: 23.650833, -103.733963: : 5/8/2026: Luis Wong: 8 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Aguascalientes: 21.93593, -102.554739: : 4/11/2026: Bruno Valente: 11 Apr 2026 ; Coordinate Uncertainty in Meters: 204.00000.

Villa de Arriaga, San Luis Potosi: 21.961103, -101.191586: : 9/21/2025: M├│nica Aguilar Gallardo: 21 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: V├¡bora de cascabel atropellada en la maltrecha Carretera Federal #23 Durango-Huazamota, entre La China y la propiedad privada de San Juan, en el kil├│metro 19-300. El sitio de atropellamiento tiene chaparral de manzanita (Arctostaphylos pungens) por un lado, y bosque espinoso de huizache (Acacia sp.) por otro. En cuanto vi la v├¡bora atropellada me detuve para fotografiarla, s├│lo que no sab├¡a si estaba viva o no. Saqu├⌐ algunas tomas de lejos y luego busqu├⌐ algo para moverla, pero mientras eso suced├¡a, pasaron un par de veh├¡culos que le aplastaron la cola.; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: En ese mismo ca├▒├│n observe dos ejemplares m├ís, la verdad eran muy grandes, sobrepasaban aproximadamente el 1.30 m de longitud; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Aguascalientes: 21.942118, -102.314893: : 5/16/2026: Bruno Valente: 16 May 2026 ; Coordinate Uncertainty in Meters: 1165.00000.

Zaragoza, San Luis Potosi: 22.082438, -100.627933: : 6/7/2025: Lul├║: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 5215.00000.

Unknown, Zacatecas: 22.36092, -101.956422: : 8/11/2025: Gabriel P├⌐rez Salazar: 11 Aug 2025 ; Coordinate Uncertainty in Meters: 1898.00000.

Unknown, San Luis Potosi: 22.117866, -101.273136: : 8/11/2025: apff_sierradesanmiguelito_conanp: 11 Aug 2025 ; Coordinate Uncertainty in Meters: 4174.00000.

Unknown, Aguascalientes: 21.897405, -102.43327: : 2/22/2026: Bruno Valente: 22 Feb 2026 ; Coordinate Uncertainty in Meters: 30338.00000.

Zacatecas, Zacatecas: 22.757045, -102.574806: : 6/12/2024: elderrv: 12 Jun 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Ahualulco, San Luis Potosi: 22.328837, -101.34153: : 9/24/2025: folgrinder: 24 Sep 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Villa Gonzalez Ortega, Zacatecas: 22.599937, -102.010406: : 10/22/2017: Arturo Santos: 22 Oct 2017 ; Coordinate Uncertainty in Meters: 15.00000.

Occurrence Remarks: Observaci├│n realizada con @lenin_lara. Hora: 15:05 PM; Coordinate Uncertainty in Meters: 1809.00000.

Salinas, San Luis Potosi: 22.526142, -101.676747: : 3/19/2020: Ra├║l Peralta Pardo: 19 Mar 2020 ; Coordinate Uncertainty in Meters: 122.00000.

Pinos, Zacatecas: 22.247011, -101.575834: : 5/14/2018: Faun├¡stica Conservaci├│n e Investigaci├│n de Especies End├⌐micas AC: 14 May 2018 ; Coordinate Uncertainty in Meters: 30298.00000.

Mexquitic de Carmona, San Luis Potosi: 22.226678, -101.231942: : 9/3/2022: Ricardo Olivo Rodr├¡guez: 3 Sep 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Armadillo de los Infante, San Luis Potosi: 22.221258, -100.63652: : 2/12/2008: Pedro N├íjera Quezada: 12 Feb 2008 ; Coordinate Uncertainty in Meters: 15.00000.

Rio Grande, Zacatecas: 23.751495, -102.996113: : 9/5/2021: arthgarcia: 5 Sep 2021 ; Coordinate Uncertainty in Meters: 201.00000.

Monte Escobedo, Zacatecas: 22.358639, -103.604496: : 8/10/2021: josepineda: 10 Aug 2021 ; Coordinate Uncertainty in Meters: 122.00000.

Monte Escobedo, Zacatecas: 22.292411, -103.617023: : 10/17/2020: saul_pinedo: 17 Oct 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Pinos, Zacatecas: 22.227067, -101.808723: : 9/22/2013: Jes├║s Lenin Lara Galv├ín: 22 Sep 2013 ; Coordinate Uncertainty in Meters: 7365.00000.

Valparaiso, Zacatecas: 23.068358, -103.526414: : 9/13/2018: Yabal Alfaro Castillo: 13 Sep 2018 ; Coordinate Uncertainty in Meters: 488.00000.

Occurrence Remarks: Observaci├│n realiza en compa├▒├¡a de @xabi_herrero_otero y @jesus_larar; Coordinate Uncertainty in Meters: 23552.00000.

Fresnillo, Zacatecas: 23.169333, -102.98887: : 9/5/2023: lsandoval: 5 Sep 2023 ; Coordinate Uncertainty in Meters: 806.00000.

Moctezuma, San Luis Potosi: 22.734336, -101.378763: : 7/29/2018: Pedro N├íjera Quezada: 29 Jul 2018 ; Coordinate Uncertainty in Meters: 244.00000.

Rioverde, San Luis Potosi: 21.914342, -100.335519: : 11/28/2019: c_olguin: 28 Nov 2019 ; Coordinate Uncertainty in Meters: 1735.00000.

Zaragoza, San Luis Potosi: 22.107211, -100.634626: : 10/14/2018: Mariana D├ívalos: 14 Oct 2018 ; Coordinate Uncertainty in Meters: 663.00000.

Occurrence Remarks: Vista por Jes├║s Cort├⌐s Garc├¡a; Coordinate Uncertainty in Meters: 5649.00000.

Sombrerete, Zacatecas: 23.634246, -103.639166: : 9/22/2012: mariacabral: 22 Sep 2012 ; Coordinate Uncertainty in Meters: 2661.00000.

Villa de Cos, Zacatecas: 23.641145, -102.641916: : 8/15/2023: diegodiaz2801x: 15 Aug 2023 ; Coordinate Uncertainty in Meters: 145019.00000.

Occurrence Remarks: Es un serpiente agresiva y su mordedura puede ser mortal si no tiene atenci├│n medica a tiempo, puede variar el color seg├║n el lugar donde habita, su tama├▒o tambi├⌐n varia, la encontramos por li general en lugares con cercados de piedras y pe├▒ascos. por lo general se alimenta de roedores y algunas lagartijas.; Coordinate Uncertainty in Meters: 4642.00000.

Susticacan, Zacatecas: 22.610205, -103.145029: : 8/18/2024: azulanemona: 18 Aug 2024 ; Coordinate Uncertainty in Meters: 1736.00000.

Soledad de Graciano Sanchez, San Luis Potosi: 22.226077, -100.827031: : 8/21/2024: Favio C├⌐sar Avilez-Avila: 21 Aug 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Sombrerete, Zacatecas: 23.692636, -103.737577: : 8/23/2024: Eric Centenero Alcal├í: 23 Aug 2024 ; Coordinate Uncertainty in Meters: 10000.00000.

Sombrerete, Zacatecas: 23.692636, -103.737577: : 8/24/2024: Eric Centenero Alcal├í: 24 Aug 2024 ; Coordinate Uncertainty in Meters: 10000.00000.

Guadalupe, Zacatecas: 22.724451, -102.561514: : 8/27/2011: luisespino: 27 Aug 2011 ; Coordinate Uncertainty in Meters: 31.00000.

Villa Juarez, San Luis Potosi: 22.25743, -100.286166: : 10/5/2024: nataliamorenorodriguez: 5 Oct 2024 ; Coordinate Uncertainty in Meters: 15625.00000.

Zaragoza, San Luis Potosi: 22.092347, -100.652183: : 8/28/2023: Chris Gruenwald Herp.mx: 28 Aug 2023 ; Coordinate Uncertainty in Meters: 5.00000.

Armadillo de los Infante, San Luis Potosi: 22.099687, -100.614447: : 8/14/2024: Luis Stevens: 14 Aug 2024 ; Coordinate Uncertainty in Meters: 244.00000.

General Zaragoza, Nuevo Leon: 24.005894, -99.695615: : 3/21/1985: Anton Hofer: 21 Mar 1985 ; Coordinate Uncertainty in Meters: 122.00000.

San Luis Potosi, San Luis Potosi: 22.064005, -100.891571: : 7/7/2015: Pedro N├íjera Quezada: 7 Jul 2015 ; Coordinate Uncertainty in Meters: 7886.00000.

Zaragoza, San Luis Potosi: 22.087563, -100.584999: : 4/15/2012: Luis Stevens: 15 Apr 2012 ; Coordinate Uncertainty in Meters: 61.00000.

Occurrence Remarks: Espec├¡ficamente quiero saber qu├⌐ especie es; Coordinate Uncertainty in Meters: 8415.00000.

Aramberri, Nuevo Leon: 24.300331, -100.002456: : 6/7/2019: Ana: 7 Jun 2019 ; Coordinate Uncertainty in Meters: 5.00000.

Occurrence Remarks: El ambiente calido y la humedad... factores favorables para ver estos reptiles... un plus a nuestra salida. Esta y casi todas las cascabeles estan protegidas por las leyes de M├⌐xico. Viperidae; Coordinate Uncertainty in Meters: 8783.00000.

Sombrerete, Zacatecas: 23.78864, -103.81017: : 4/27/2025: Diego Nevarez Carrillo: 27 Apr 2025 ; Coordinate Uncertainty in Meters: 33.00000.

Sombrerete, Zacatecas: 23.783779, -103.797716: : 7/5/2019: pulgarindavid: 5 Jul 2019 ; Coordinate Uncertainty in Meters: 31.00000.

Sombrerete, Zacatecas: 23.785122, -103.798464: : 7/5/2019: pulgarindavid: 5 Jul 2019 ; Coordinate Uncertainty in Meters: 244.00000.

Zaragoza, San Luis Potosi: 22.044891, -100.611915: : 6/7/2025: Sadoth V├ízquez: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 303.00000.

Occurrence Remarks: stunning animal -; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Photographed basking in situ. -; Coordinate Uncertainty in Meters: 0.11000.

Miquihuana, Tamaulipas: 23.740667, -99.820597: : 8/15/2006: Chris Harrison: 15 Aug 2006 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Same snake as http://www.inaturalist.org/observations/4284496; Coordinate Uncertainty in Meters: 30154.00000.

Doctor Arroyo, Nuevo Leon: 23.575556, -99.9725: : 7/29/2025: gregorio_tirzo: 29 Jul 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Salinas, Zacatecas: 22.683692, -101.877473: : 8/20/2023: Berenice De Le├│n: 20 Aug 2023 ; Coordinate Uncertainty in Meters: 30258.00000.

Soledad de Graciano Sanchez, San Luis Potosi: 22.41754, -100.787887: : 2/23/2019: Pedro N├íjera Quezada: 23 Feb 2019 ; Coordinate Uncertainty in Meters: 1038.00000.

Moctezuma, San Luis Potosi: 22.680648, -101.212016: : 8/3/2016: Irma Esther Montenegro H: 3 Aug 2016 ; Coordinate Uncertainty in Meters: 977.00000.

Vanegas, San Luis Potosi: 24.218788, -100.898695: : 7/5/2016: Pedro N├íjera Quezada: 5 Jul 2016 ; Coordinate Uncertainty in Meters: 697.00000.

Bustamante, Tamaulipas: 23.361376, -99.850724: : 2/12/2020: Benigno G├│mez Garza: 12 Feb 2020 ; Coordinate Uncertainty in Meters: 171.00000.

General Zaragoza, Nuevo Leon: 23.877009, -99.570723: : 8/20/2009: lobo_de_la_sierra: 20 Aug 2009 ; Coordinate Uncertainty in Meters: 15.00000.

Villa de Reyes, San Luis Potosi: 21.950386, -100.827417: : 4/15/2016: Jesus Gordolomi Butterball RC: 15 Apr 2016 ; Coordinate Uncertainty in Meters: 322.00000.

Occurrence Remarks: Photo by T. Fisher; Coordinate Uncertainty in Meters: 30258.00000.

Guadalcazar, San Luis Potosi: 22.688331, -100.571933: : 8/17/2006: Michael Price: 17 Aug 2006 ; Coordinate Uncertainty in Meters: 30258.00000.

Occurrence Remarks: Killed by rancher approximately 30 minutes prior to our arrival... he said that they hang them up like this to discourage other snakes from coming into the area...; Coordinate Uncertainty in Meters: 30258.00000.

Occurrence Remarks: Had been killed the day prior by the residents of this premises...; Coordinate Uncertainty in Meters: 4.00000.

Aramberri, Nuevo Leon: 24.076957, -100.16915: : 6/14/2010: Michael Price: 14 Jun 2010 ; Coordinate Uncertainty in Meters: 30112.00000.

Doctor Arroyo, Nuevo Leon: 23.612311, -100.352428: : 8/17/2006: Michael Price: 17 Aug 2006 ; Coordinate Uncertainty in Meters: 30154.00000.

Occurrence Remarks: E.G. Padilla photo... Specimen was in the process of being killed by a local when we made this observation... food bolus present; contents may be seen in photo as well...; Coordinate Uncertainty in Meters: 30154.00000.

Occurrence Remarks: Photo by T Fisher.; Coordinate Uncertainty in Meters: 30154.00000.

Pinos, Zacatecas: 22.047064, -101.447442: : 7/15/2016: Arturo Castro Castro: 15 Jul 2016 ; Coordinate Uncertainty in Meters: 3329.00000.

Sombrerete, Zacatecas: 23.800227, -103.80591: : 9/28/2011: Elizabeth Esperanza Arag├│n Pi├▒a: 28 Sep 2011 :
Occurrence Remarks: Ejido Villa Insurgentes, Parque Nacional Sierra de ├ôrganos; Coordinate Uncertainty in Meters: 0.11000.

Zaragoza, San Luis Potosi: 21.964276, -100.508914: : 7/12/2020: Luis Stevens: 12 Jul 2020 ; Coordinate Uncertainty in Meters: 488.00000.

Mazapil, Zacatecas: 24.392496, -102.527794: : 11/25/2015: alvaro_aguilar: 25 Nov 2015 ; Coordinate Uncertainty in Meters: 488.00000.

Doctor Arroyo, Nuevo Leon: 23.706419, -100.19412: : 8/24/2020: otnielrdz: 24 Aug 2020 ; Coordinate Uncertainty in Meters: 61.00000.

Villa de Ramos, San Luis Potosi: 22.905428, -101.681944: : 9/29/2017: Jes├║s Lenin Lara Galv├ín: 29 Sep 2017 ; Coordinate Uncertainty in Meters: 0.11000.

Valparaiso, Zacatecas: 22.886292, -103.366227: : 8/6/2020: ALIDA VELAZQUEZ G.: 6 Aug 2020 ; Coordinate Uncertainty in Meters: 8.00000.

Mazapil, Zacatecas: 24.150918, -101.481064: : 7/5/2012: Eric Centenero Alcal├í: 5 Jul 2012 ; Coordinate Uncertainty in Meters: 6500.00000.

Mazapil, Zacatecas: 24.151427, -101.481372: : 7/5/2012: Eric Centenero Alcal├í: 5 Jul 2012 ; Coordinate Uncertainty in Meters: 6500.00000.

Cerro de San Pedro, San Luis Potosi: 22.192139, -100.715598: : 4/3/2021: Lul├║: 3 Apr 2021 ; Coordinate Uncertainty in Meters: 4.00000.

Mazapil, Zacatecas: 24.142564, -101.539341: : 6/24/2012: Eric Centenero Alcal├í: 24 Jun 2012 ; Coordinate Uncertainty in Meters: 6000.00000.

Mexquitic de Carmona, San Luis Potosi: 22.298887, -101.088112: : 5/30/2021: Cynthia Huerta L├írraga: 30 May 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Mexquitic de Carmona, San Luis Potosi: 22.269549, -101.106478: : 5/31/2021: Alejandro Aguilar Fern├índez: 31 May 2021 :
Occurrence Remarks: Foto: Cinthya Huera; Coordinate Uncertainty in Meters: 244.00000.

Mexquitic de Carmona, San Luis Potosi: 22.1337, -101.149439: : 8/2/2020: Luis Stevens: 2 Aug 2020 ; Coordinate Uncertainty in Meters: 61.00000.

Chalchihuites, Zacatecas: 23.47583, -103.880988: : 10/29/2020: Salvador Siordia Galindo: 29 Oct 2020 ; Coordinate Uncertainty in Meters: 1487.00000.

Mazapil, Zacatecas: 24.157939, -101.500132: : 6/18/2021: Marco Antonio Ju├írez Cabral: 18 Jun 2021 ; Coordinate Uncertainty in Meters: 122.00000.

Armadillo de los Infante, San Luis Potosi: 22.196992, -100.684308: : 7/17/2021: Edgar Emiliano Gomez Rivera: 17 Jul 2021 ; Coordinate Uncertainty in Meters: 3637.00000.

Sombrerete, Zacatecas: 23.64739, -103.628022: : 7/24/2021: mata: 24 Jul 2021 ; Coordinate Uncertainty in Meters: 203.00000.

San Luis Potosi, San Luis Potosi: 22.146324, -101.041374: : 8/2/2021: F├⌐lix Alvarado: 2 Aug 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Trancoso, Zacatecas: 22.733117, -102.296794: : 8/22/2021: Adriana H Cabral Fr├¡as: 22 Aug 2021 ; Coordinate Uncertainty in Meters: 30258.00000.

Villa de Reyes, San Luis Potosi: 21.97266, -101.008033: : 8/29/2021: Faun├¡stica Conservaci├│n e Investigaci├│n de Especies End├⌐micas AC: 29 Aug 2021 :
Occurrence Remarks: Registro obtenido durante la capacitaci├│n de monitores comunitarios del Proyecto PROREST/CC/397/202 en el Parque Nacional Gogorr├│n; Coordinate Uncertainty in Meters: 30338.00000.

Susticacan, Zacatecas: 22.626076, -103.196935: : 9/5/2021: Edi y Jime Amb: 5 Sep 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Zaragoza, San Luis Potosi: 22.038092, -100.730924: : 9/13/2021: el_mario: 13 Sep 2021 ; Coordinate Uncertainty in Meters: 1347.00000.

Pinos, Zacatecas: 22.477545, -101.56118: : 6/27/2015: Jes├║s Manuel Mart├¡nez-Calderas: 27 Jun 2015 ; Coordinate Uncertainty in Meters: 30278.00000.

Villa de Guadalupe, San Luis Potosi: 23.02008, -100.819277: : 9/20/2021: denisegonzalez: 20 Sep 2021 :
Occurrence Remarks: Reci├⌐n la hab├¡an matado. Le quitaron la cabeza.; Coordinate Uncertainty in Meters: 5665.00000.

Pinos, Zacatecas: 22.259748, -101.575773: : 5/2/2015: Faun├¡stica Conservaci├│n e Investigaci├│n de Especies End├⌐micas AC: 2 May 2015 :
Occurrence Remarks: 0.13 km S, 4.03 km E Pinos (cabecera municipal); Coordinate Uncertainty in Meters: 30298.00000.

San Luis Potosi, San Luis Potosi: 22.006867, -101.097205: : 10/3/2021: Eloy Bicondoa: 3 Oct 2021 ; Coordinate Uncertainty in Meters: 6.00000.

Durango, Durango: 23.813929, -105.210479: : 9/17/2025: Hugo van Vliet: 17 Sep 2025 ; Coordinate Uncertainty in Meters: 819.00000.

Pabellon de Arteaga, Aguascalientes: 22.051503, -102.407539: : 9/16/2025: Bruno Valente: 16 Sep 2025 ; Coordinate Uncertainty in Meters: 30318.00000.

San Jose de Gracia, Aguascalientes: 22.127015, -102.530199: : 9/16/2025: Bruno Valente: 16 Sep 2025 ; Coordinate Uncertainty in Meters: 30318.00000.

Pueblo Nuevo, Durango: 23.35256, -104.935555: : 9/10/2025: yalexcia_carrera: 10 Sep 2025 ; Coordinate Uncertainty in Meters: 30196.00000.

Durango, Durango: 23.818378, -105.190095: : 9/24/2025: Hugo van Vliet: 24 Sep 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Jesus Maria, Aguascalientes: 22.039648, -102.412866: : 9/16/2025: Sarah M. Beltran: 16 Sep 2025 ; Coordinate Uncertainty in Meters: 201.00000.

Unknown, San Luis Potosi: 21.883344, -101.239264: : 3/31/2026: Arturo: 31 Mar 2026 ; Coordinate Uncertainty in Meters: 58.00000.

General Zaragoza, Nuevo Leon: 23.890548, -100.001704: : 10/1/2025: Leonardo M. Mart├¡nez-Campos: 1 Oct 2025 ; Coordinate Uncertainty in Meters: 75479.00000.

Unknown, Aguascalientes: 21.934542, -102.562262: : 6/8/2026: Leonardo M. Mart├¡nez-Campos: 8 Jun 2026 ; Coordinate Uncertainty in Meters: 30338.00000.

Unknown, Aguascalientes: 22.080336, -102.479559: : 6/8/2026: Leonardo M. Mart├¡nez-Campos: 8 Jun 2026 ; Coordinate Uncertainty in Meters: 30318.00000.

Unknown, Aguascalientes: 21.93593, -102.554739: : 6/8/2026: Bruno Valente: 8 Jun 2026 ; Coordinate Uncertainty in Meters: 204.00000.

Unknown, Nuevo Leon: 24.28905, -99.878029: : 6/24/2026: Leonardo M. Mart├¡nez-Campos: 24 Jun 2026 ; Coordinate Uncertainty in Meters: 33151.00000.

Unknown, Nuevo Leon: 24.391715, -99.856826: : 6/24/2026: Leonardo M. Mart├¡nez-Campos: 24 Jun 2026 ; Coordinate Uncertainty in Meters: 30090.00000.

Asientos, Aguascalientes: 22.182999, -102.119476: : 10/9/2021: Juan Carlos Carranco Anaya: 9 Oct 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Ojuelos de Jalisco, Jalisco: 21.86697, -101.851284: : 2/9/2018: Kevin Meza: 9 Feb 2018 ; Coordinate Uncertainty in Meters: 492.00000.

Ojuelos de Jalisco, Jalisco: 21.866678, -101.838301: : 11/26/2021: Kevin Meza: 26 Nov 2021 ; Coordinate Uncertainty in Meters: 433.00000.

Jesus Maria, Aguascalientes: 21.914432, -102.404253: : 5/13/2022: Rafael Huerta Cu├⌐llar: 13 May 2022 :
Occurrence Remarks: Serpiente asesinada por un ranchero; Coordinate Uncertainty in Meters: 5.00000.

Huejuquilla el Alto, Jalisco: 22.666733, -103.809783: : 9/3/2022: molossus: 3 Sep 2022 ; Coordinate Uncertainty in Meters: 4.00000.

Colotlan, Jalisco: 21.997084, -103.214373: : 5/14/2022: Sandra Vargas: 14 May 2022 ; Coordinate Uncertainty in Meters: 204.00000.

Occurrence Remarks: Ejemplar atropellado; Coordinate Uncertainty in Meters: 2169.00000.

Aguascalientes, Aguascalientes: 21.885241, -102.291568: : 12/17/2023: Bruno Valente: 17 Dec 2023 ; Coordinate Uncertainty in Meters: 10167.00000.

Ojuelos de Jalisco, Jalisco: 21.865153, -101.847712: : 7/3/2019: Kevin Meza: 3 Jul 2019 ; Coordinate Uncertainty in Meters: 636.00000.

San Jose de Gracia, Aguascalientes: 22.168794, -102.631272: : 9/19/2021: Frida Gil Rico: 19 Sep 2021 ; Coordinate Uncertainty in Meters: 0.11000.

San Jose de Gracia, Aguascalientes: 22.150102, -102.54807: : 6/20/2025: Bruno Valente: 20 Jun 2025 ; Coordinate Uncertainty in Meters: 30318.00000.

Ojuelos de Jalisco, Jalisco: 21.878756, -101.85197: : 11/7/2019: Kevin Meza: 7 Nov 2019 ; Coordinate Uncertainty in Meters: 432.00000.

Ojuelos de Jalisco, Jalisco: 21.862052, -101.839334: : 6/4/2020: Kevin Meza: 4 Jun 2020 ; Coordinate Uncertainty in Meters: 758.00000.

Ojuelos de Jalisco, Jalisco: 21.902139, -101.846663: : 8/28/2020: Kevin Meza: 28 Aug 2020 ; Coordinate Uncertainty in Meters: 370.00000.

Ojuelos de Jalisco, Jalisco: 21.857775, -101.836539: : 9/9/2020: Kevin Meza: 9 Sep 2020 ; Coordinate Uncertainty in Meters: 343.00000.

Unknown, Aguascalientes: 21.883995, -102.417038: : 6/20/2026: Carlos Franco: 20 Jun 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Mazapil, Zacatecas: 23.892481, -101.578781: : 10/13/2025: Kevin Meza: 13 Oct 2025 ; Coordinate Uncertainty in Meters: 1501.00000.

Colotlan, Jalisco: 22.090559, -103.266474: : 9/20/2025: raygozafabio1111: 20 Sep 2025 ; Coordinate Uncertainty in Meters: 31.00000.

Zaragoza, San Luis Potosi: 22.045446, -100.611797: : 6/7/2025: Juve: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 444.00000.

Monte Escobedo, Zacatecas: 22.29104, -103.592137: : 9/7/2020: josepineda: 7 Sep 2020 ; Coordinate Uncertainty in Meters: 122.00000.

Mazapil, Zacatecas: 23.885632, -101.547506: : 7/3/2024: Kevin Meza: 3 Jul 2024 ; Coordinate Uncertainty in Meters: 210.00000.

Zaragoza, San Luis Potosi: 22.03672, -100.577887: : 7/3/2019: c_olguin: 3 Jul 2019 ; Coordinate Uncertainty in Meters: 122.00000.

Armadillo de los Infante, San Luis Potosi: 22.245592, -100.657422: : 10/21/2023: emiliosilvaquintero: 21 Oct 2023 ; Coordinate Uncertainty in Meters: 5.00000.

Mezquital, Durango: 23.75875, -104.524308: : 9/5/2024: yalexcia_carrera: 5 Sep 2024 ; Coordinate Uncertainty in Meters: 5.00000.

Mexquitic de Carmona, San Luis Potosi: 22.333432, -101.078929: : 4/15/2022: Brandon Misael: 15 Apr 2022 ; Coordinate Uncertainty in Meters: 30298.00000.

Fresnillo, Zacatecas: 23.047748, -102.938398: : 9/5/2021: Yabal Alfaro Castillo: 5 Sep 2021 ; Coordinate Uncertainty in Meters: 15.00000.

San Luis Potosi, San Luis Potosi: 22.152089, -100.973302: : 11/10/2024: Lul├║: 10 Nov 2024 ; Coordinate Uncertainty in Meters: 21738.00000.

Monte Escobedo, Zacatecas: 22.381925, -103.529106: : 9/17/2023: josepineda: 17 Sep 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Snake was very high in elevation, up above Real de Catorce, Mexico.; Coordinate Uncertainty in Meters: 200.00000.

Unknown, Zacatecas: 22.61199, -103.148878: : 7/3/2026: Miguel Garc├¡a: 3 Jul 2026 ; Coordinate Uncertainty in Meters: 171.00000.

Mazapil, Zacatecas: 23.899934, -101.516251: : 7/4/2024: Kevin Meza: 4 Jul 2024 ; Coordinate Uncertainty in Meters: 1109.00000.

Monte Escobedo, Zacatecas: 22.300584, -103.502276: : 10/9/2024: josepineda: 9 Oct 2024 ; Coordinate Uncertainty in Meters: 8.00000.

Pueblo Nuevo, Durango: 23.401522, -105.01943: : 8/26/2025: yalexcia_carrera: 26 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Suchil, Durango: 23.387519, -104.246818: : 7/19/2017: candecardenas: 19 Jul 2017 ; Coordinate Uncertainty in Meters: 4.00000.

Suchil, Durango: 23.405534, -104.18076: : 8/15/2018: candecardenas: 15 Aug 2018 ; Coordinate Uncertainty in Meters: 8.00000.

Canatlan, Durango: 24.381439, -104.705978: : 8/31/2025: taoveloz: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Durango, Durango: 23.895572, -105.012233: : 9/26/2019: Heriberto ├üvila-Gonz├ílez: 26 Sep 2019 ; Coordinate Uncertainty in Meters: 8.00000.

Mezquital, Durango: 23.443089, -104.352264: : 8/15/2006: Carlos Galindo-Leal: 15 Aug 2006 ; Coordinate Uncertainty in Meters: 3903.00000.

Pueblo Nuevo, Durango: 23.452543, -105.468093: : 7/7/2009: Luis Fuentes Castillo: 7 Jul 2009 ; Coordinate Uncertainty in Meters: 5326.00000.

Durango, Durango: 23.945842, -105.014042: : 9/5/2011: Luis Fuentes Castillo: 5 Sep 2011 ; Coordinate Uncertainty in Meters: 10222.00000.

Occurrence Remarks: NCPE El Alem├ín; Coordinate Uncertainty in Meters: 976.00000.

Pueblo Nuevo, Durango: 23.555544, -105.371735: : 8/25/2019: Nancy Silva ├üvila: 25 Aug 2019 ; Coordinate Uncertainty in Meters: 31.00000.

Occurrence Remarks: Ejido San Juan de Michis; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Ejido San Juan de Michis; Coordinate Uncertainty in Meters: 122.00000.

Occurrence Remarks: Ejido San Juan de Michis; Coordinate Uncertainty in Meters: 244.00000.

Suchil, Durango: 23.403326, -104.185515: : 7/8/2020: FERNANDO QUIROZ: 8 Jul 2020 ; Coordinate Uncertainty in Meters: 15.00000.

Suchil, Durango: 23.401298, -104.28883: : 8/28/2020: Jes├║s Manuel Lozano Mendoza: 28 Aug 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: La v├¡bora ya estaba muerta, sobre una brecha; Coordinate Uncertainty in Meters: 1.11000.

Mezquital, Durango: 22.548376, -104.501966: : 1/17/2022: marckott: 17 Jan 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Durango, Durango: 23.828087, -105.21607: : 7/30/2021: Arturo Castro Castro: 30 Jul 2021 ; Coordinate Uncertainty in Meters: 1614.00000.

Mazapil, Zacatecas: 23.929865, -102.156929: : 9/5/2025: Yabal Alfaro Castillo: 5 Sep 2025 ; Coordinate Uncertainty in Meters: 61.00000.

Durango, Durango: 23.825728, -105.246636: : 8/8/2020: Norma Piedra: 8 Aug 2020 ; Coordinate Uncertainty in Meters: 4858.00000.

Occurrence Remarks: ┬┐Me podr├¡an ayudar a identificar esta especie de serpiente de cascabel?; Coordinate Uncertainty in Meters: 203.00000.

Suchil, Durango: 23.47948, -104.258378: : 9/22/2013: cristinagarciapena: 22 Sep 2013 ; Coordinate Uncertainty in Meters: 122.00000.

Durango, Durango: 23.85983, -104.809772: : 9/24/2022: Katiya (Yekaterina Pavlova): 24 Sep 2022 ; Coordinate Uncertainty in Meters: 30133.00000.

Canatlan, Durango: 24.356687, -104.683171: : 7/25/2022: Luis Fuentes Castillo: 25 Jul 2022 ; Coordinate Uncertainty in Meters: 1459.00000.

San Dimas, Durango: 24.429881, -105.71018: : 8/7/2024: Pepe Santillan: 7 Aug 2024 ; Coordinate Uncertainty in Meters: 1065.00000.

Durango, Durango: 23.542709, -104.957979: : 12/31/2022: enriquevegaf: 31 Dec 2022 ; Coordinate Uncertainty in Meters: 244.00000.

Durango, Durango: 23.5425, -104.958056: : 10/16/2022: enriquevegaf: 16 Oct 2022 ; Coordinate Uncertainty in Meters: 11.10000.

Unknown, Durango: 23.347521, -104.205651: : 6/22/2026: Favian Flores Medina: 22 Jun 2026 ; Coordinate Uncertainty in Meters: 82.00000.

Unknown, San Luis Potosi: 22.238717, -100.881411: : 6/17/2026: Ulises Pinedo: 17 Jun 2026 ; Coordinate Uncertainty in Meters: 30298.00000.

Unknown, Aguascalientes: 21.91215, -102.583559: : 7/17/2026: Bruno Valente: 17 Jul 2026 ; Coordinate Uncertainty in Meters: 196.00000.

Unknown, Durango: 23.858078, -104.766617: : 7/19/2026: Gabriela Laines: 19 Jul 2026 ; Coordinate Uncertainty in Meters: 10.00000.

Mezquital, Durango: 23.369052, -104.752432: : 8/13/2018: mizraim: 13 Aug 2018 ; Coordinate Uncertainty in Meters: 7813.00000.

Unknown, Nuevo Leon: 23.940251, -99.762421: : 4/18/2026: elianagarcia88: 18 Apr 2026 ; Coordinate Uncertainty in Meters: 84.00000.

San Dimas, Durango: 24.468714, -105.795246: : 8/21/2018: Manuel Cortina: 21 Aug 2018 ; Coordinate Uncertainty in Meters: 5.00000.

Sombrerete, Zacatecas: 23.787851, -103.801772: : 8/31/2025: Sergio ≡ƒç▓≡ƒç╜≡ƒô╕≡ƒô╣≡ƒî╡≡ƒî│≡ƒî▓≡ƒìâ≡ƒ¬╛: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 1133.00000.

Suchil, Durango: 23.296609, -104.337337: : 7/4/2024: Favian Flores Medina: 4 Jul 2024 ; Coordinate Uncertainty in Meters: 1415.00000.

Chalchihuites, Zacatecas: 23.421855, -103.830278: : 8/31/2025: folgrinder: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Durango, Durango: 23.81089, -105.190666: : 6/30/2023: rafaelestrada: 30 Jun 2023 ; Coordinate Uncertainty in Meters: 1984.00000.

San Jose de Gracia, Aguascalientes: 22.19865, -102.45074: : 8/11/2020: JavierLV: 11 Aug 2020 ; Coordinate Uncertainty in Meters: 30318.00000.

Monte Escobedo, Zacatecas: 22.358335, -103.607233: : 8/10/2021: josepineda: 10 Aug 2021 ; Coordinate Uncertainty in Meters: 61.00000.

Parras, Coahuila: 25.457653, -101.797608: : 10/1/2024: juanjoseromero: 1 Oct 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Occurrence Remarks: Serpientes en cortejo; Coordinate Uncertainty in Meters: 14.00000.

Saltillo, Coahuila: 25.258623, -100.906863: : 7/4/2013: Rigel Nava: 4 Jul 2013 ; Coordinate Uncertainty in Meters: 1852.00000.

Saltillo, Coahuila: 25.337276, -100.985882: : 8/24/2024: Jos├⌐ G. Flores Ventura: 24 Aug 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Chihuahua, Chihuahua: 28.833129, -106.481561: : 10/20/2025: Alejandra Pe├▒a Estrada: 20 Oct 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Saltillo, Coahuila: 25.412808, -100.9636: : 10/24/2025: ecologo_punk: 24 Oct 2025 ; Coordinate Uncertainty in Meters: 28.00000.

Saltillo, Coahuila: 25.282932, -100.966979: : 10/22/2025: Leoadan: 22 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Ocampo, Chihuahua: 28.19369, -108.396501: : 10/17/2025: babonoyaba: 17 Oct 2025 ; Coordinate Uncertainty in Meters: 31.00000.

Ocampo, Chihuahua: 28.194531, -108.391501: : 10/18/2025: babonoyaba: 18 Oct 2025 ; Coordinate Uncertainty in Meters: 488.00000.

Saltillo, Coahuila: 25.339777, -100.999082: : 8/22/2025: Ra├║l Fernando Gaona Sol├¡s: 22 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Temosachic, Chihuahua: 28.671307, -108.441922: : 8/14/2025: otonielval: 14 Aug 2025 ; Coordinate Uncertainty in Meters: 1953.00000.

Temosachic, Chihuahua: 28.671307, -108.441922: : 8/22/2025: otonielval: 22 Aug 2025 ; Coordinate Uncertainty in Meters: 1953.00000.

Chihuahua, Chihuahua: 28.905617, -106.339941: : 10/20/2025: luis angel leon santiba├▒ez: 20 Oct 2025 ; Coordinate Uncertainty in Meters: 500.00000.

Saltillo, Coahuila: 25.356109, -101.051092: : 11/9/2025: diegoherp: 9 Nov 2025 ; Coordinate Uncertainty in Meters: 11.00000.

Riva Palacio, Chihuahua: 28.692979, -106.487133: : 7/12/2023: bettyandujo: 12 Jul 2023 ; Coordinate Uncertainty in Meters: 35.00000.

Arteaga, Coahuila: 25.234522, -100.831028: : 5/24/2017: Arturo Cruz: 24 May 2017 ; Coordinate Uncertainty in Meters: 0.11000.

Moctezuma, Sonora: 29.657007, -109.912695: : 10/4/2014: Oscar Leonardo Chavez Torres: 4 Oct 2014 ; Coordinate Uncertainty in Meters: 11603.00000.

Badiraguato, Sinaloa: 25.620067, -107.060959: : 10/13/2021: Sinaloa Silvestre: 13 Oct 2021 ; Coordinate Uncertainty in Meters: 17311.00000.

Occurrence Remarks: Dead on road.; Coordinate Uncertainty in Meters: 0.11000.

Bacanora, Sonora: 28.900614, -109.514799: : 9/17/2022: Diego Barrales: 17 Sep 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Bacanora, Sonora: 28.90069, -109.514793: : 9/16/2022: Diego Barrales: 16 Sep 2022 ; Coordinate Uncertainty in Meters: 1.11000.

Bacanora, Sonora: 28.962198, -109.552368: : 9/17/2022: Diego Barrales: 17 Sep 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Guaymas, Sonora: 27.973076, -111.069718: : 3/9/2023: Manuel Maga├▒a: 9 Mar 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Hermosillo, Sonora: 28.84762, -111.384567: : 10/6/2022: Oscar Leonardo Chavez Torres: 6 Oct 2022 ; Coordinate Uncertainty in Meters: 16.00000.

Occurrence Remarks: This was an interesting one found during a Phrynosoma survey. Our group agreed on molossus molossus but perhaps there is some basiliscus influence? Two others were found during this survey, both looking quite different from this one.; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Perhaps some basiliscus influence?; Coordinate Uncertainty in Meters: 3.00000.

Hermosillo, Sonora: 29.221395, -110.983322: : 8/11/2018: Jorge H. Valdez: 11 Aug 2018 ; Coordinate Uncertainty in Meters: 5.00000.

Bacoachi, Sonora: 30.832157, -109.910853: : 8/26/2014: Diego Barrales: 26 Aug 2014 ; Coordinate Uncertainty in Meters: 29304.00000.

Hermosillo, Sonora: 28.960045, -110.798257: : 5/15/2023: planta_yaqui: 15 May 2023 ; Coordinate Uncertainty in Meters: 103.00000.

Badiraguato, Sinaloa: 25.620067, -107.060959: : 8/13/2021: Sinaloa Silvestre: 13 Aug 2021 ; Coordinate Uncertainty in Meters: 17311.00000.

Lerdo, Durango: 25.359264, -103.727661: : 8/31/2025: Leonardo M. Mart├¡nez-Campos: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 29981.00000.

Hermosillo, Sonora: 28.291853, -111.4235: : 4/7/2023: Uriel: 7 Apr 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Nogales, Arizona: 31.265469, -111.112736: : 8/20/2009: Steve Bledsoe: 20 Aug 2009 ; Coordinate Uncertainty in Meters: 29252.00000.

Santa Cruz, Arizona: 31.278956, -110.377763: : 7/22/2023: Richard D Reams: 22 Jul 2023 ; Coordinate Uncertainty in Meters: 29252.00000.

Hermosillo, Sonora: 29.15018, -110.948439: : 7/18/2012: Ra├║l Pino: 18 Jul 2012 ; Coordinate Uncertainty in Meters: 66.00000.

Occurrence Remarks: 68F; Coordinate Uncertainty in Meters: 29252.00000.

Guaymas, Sonora: 27.910122, -110.952448: : 8/24/2023: Guillermo Soberon: 24 Aug 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Lerdo, Durango: 25.28086, -103.786432: : 8/31/2025: Leonardo M. Mart├¡nez-Campos: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 29981.00000.

Occurrence Remarks: DOR; Coordinate Uncertainty in Meters: 29252.00000.

Ures, Sonora: 29.23582, -110.237261: : 7/13/2023: Minerva Crucmile: 13 Jul 2023 ; Coordinate Uncertainty in Meters: 399293.00000.

Agua Prieta, Sonora: 31.076225, -108.974872: : 8/18/2008: Jason K.: 18 Aug 2008 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Lamentablemente degolladas por locales; Coordinate Uncertainty in Meters: 11.00000.

Cumpas, Sonora: 29.994693, -109.780308: : 11/1/2018: aracelyromero: 1 Nov 2018 ; Coordinate Uncertainty in Meters: 43982.00000.

Nacozari de Garcia, Sonora: 30.58375, -109.240414: : 8/11/2015: Diego Barrales: 11 Aug 2015 ; Coordinate Uncertainty in Meters: 4.00000.

Cananea, Sonora: 30.927481, -110.16919: : 9/11/2023: Courtney Christie: 11 Sep 2023 ; Coordinate Uncertainty in Meters: 29304.00000.

Cananea, Sonora: 30.961866, -110.24733: : 9/12/2023: Courtney Christie: 12 Sep 2023 ; Coordinate Uncertainty in Meters: 29304.00000.

Santa Cruz, Arizona: 31.215634, -110.380772: : 7/22/2015: murphycat: 22 Jul 2015 ; Coordinate Uncertainty in Meters: 29252.00000.

Hermosillo, Sonora: 29.150233, -110.93802: : 6/16/2018: luckyjuice: 16 Jun 2018 ; Coordinate Uncertainty in Meters: 32.00000.

Santa Isabel, Chihuahua: 28.312694, -106.305759: : 10/4/2025: sergio1953: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 1644.00000.

Caborca, Sonora: 30.257922, -112.339485: : 9/1/1999: Carlos G Velazco-Macias: 1 Sep 1999 ; Coordinate Uncertainty in Meters: 48.00000.

Caborca, Sonora: 30.255477, -112.348771: : 9/18/2000: Carlos G Velazco-Macias: 18 Sep 2000 ; Coordinate Uncertainty in Meters: 51.00000.

Nogales, Arizona: 31.271755, -111.04477: : 7/3/2025: Yinan Li: 3 Jul 2025 ; Coordinate Uncertainty in Meters: 29252.00000.

Casas Grandes, Chihuahua: 30.362813, -107.950581: : 8/2/2024: DIANA ALEJANDRA MOLINA CHACON: 2 Aug 2024 ; Coordinate Uncertainty in Meters: 2200.00000.

Guaymas, Sonora: 28.019718, -111.06308: : 2/15/2024: Kevin Daniel V├ízquez Alt├║zar: 15 Feb 2024 ; Coordinate Uncertainty in Meters: 31.00000.

Agua Prieta, Arizona: 31.27664, -109.184013: : 7/23/2018: brandon_dietrich: 23 Jul 2018 ; Coordinate Uncertainty in Meters: 29252.00000.

Trincheras, Sonora: 30.154335, -111.814402: : 4/4/2024: gambusino: 4 Apr 2024 ; Coordinate Uncertainty in Meters: 25.00000.

Guadalupe y Calvo, Chihuahua: 26.24406, -106.459221: : 5/2/2019: Alfredo D├¡az Camacho: 2 May 2019 ; Coordinate Uncertainty in Meters: 102.00000.

Ocampo, Chihuahua: 28.174813, -108.209612: : 7/28/2023: fgdlr: 28 Jul 2023 ; Coordinate Uncertainty in Meters: 5.00000.

Nacori Chico, Chihuahua: 29.745994, -108.571859: : 6/23/2022: Abel guerrero: 23 Jun 2022 ; Coordinate Uncertainty in Meters: 29458.00000.

Fronteras, Sonora: 30.894206, -109.558419: : 7/28/2024: Miguel Grageda: 28 Jul 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Nogales, Arizona: 31.272434, -111.193536: : 8/3/2024: Paul Maier: 3 Aug 2024 ; Coordinate Uncertainty in Meters: 29252.00000.

Occurrence Remarks: 75F, DOR- just hit; Coordinate Uncertainty in Meters: 29252.00000.

Imuris, Sonora: 30.883979, -110.643151: : 8/16/2024: Ra├║l ├ülvarez Mora: 16 Aug 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Temosachic, Chihuahua: 28.579911, -108.170208: : 8/8/2023: Javier Cruz Nieto: 8 Aug 2023 ; Coordinate Uncertainty in Meters: 2.00000.

Santa Cruz, Arizona: 31.270734, -110.608728: : 7/4/2024: timoteo_b: 4 Jul 2024 ; Coordinate Uncertainty in Meters: 29252.00000.

Guaymas, Sonora: 27.861722, -110.903997: : 4/27/2019: Usvaldo GC: 27 Apr 2019 ; Coordinate Uncertainty in Meters: 61.00000.

Satevo, Chihuahua: 27.541513, -106.3162: : 8/24/2021: rkgarcia: 24 Aug 2021 ; Coordinate Uncertainty in Meters: 11.00000.

Chihuahua, Chihuahua: 28.831028, -106.431069: : 8/23/2021: Alejandra Pe├▒a Estrada: 23 Aug 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Hermosillo, Sonora: 29.103032, -110.996682: : 8/27/2024: Luis Enrique Vega: 27 Aug 2024 ; Coordinate Uncertainty in Meters: 6.00000.

Guanacevi, Durango: 25.918217, -106.43682: : 8/20/2021: Cutberto Valencia Barraza: 20 Aug 2021 ; Coordinate Uncertainty in Meters: 42.00000.

Guadalupe y Calvo, Chihuahua: 25.850006, -106.72774: : 10/8/2014: Cutberto Valencia Barraza: 8 Oct 2014 :
Occurrence Remarks: V├¡bora de cascabel, vista cerca del camino de terracer├¡a al poblado de La Mesa de San Rafael, Mpio. de Guadalupe y Calvo, Chih.; Coordinate Uncertainty in Meters: 81.00000.

Guadalupe y Calvo, Chihuahua: 25.868205, -106.647518: : 10/8/2014: Cutberto Valencia Barraza: 8 Oct 2014 :
Occurrence Remarks: V├¡bora de cascabel entrando a una madriguera.; Coordinate Uncertainty in Meters: 262.00000.

Ocampo, Chihuahua: 28.145734, -108.146312: : 9/6/2019: Francisco J. Mu├▒oz Nolasco: 6 Sep 2019 ; Coordinate Uncertainty in Meters: 2000.00000.

Nuevo Casas Grandes, Chihuahua: 30.493639, -107.740517: : 7/14/2018: Ana Gatica Colima: 14 Jul 2018 ; Coordinate Uncertainty in Meters: 29356.00000.

Occurrence Remarks: observen los cvascabeles para que se den una idea del tama├▒o , desgraciadamente estaba muy cercas y tra├¡a le lente 600 por lo que no la pude tomar completra; Coordinate Uncertainty in Meters: 1647.00000.

Guaymas, Sonora: 27.943022, -111.082216: : 8/17/2024: Manuel Maga├▒a: 17 Aug 2024 ; Coordinate Uncertainty in Meters: 605.00000.

Agua Prieta, Sonora: 31.102329, -108.860478: : 2/12/2008: Diana Zamora: 12 Feb 2008 ; Coordinate Uncertainty in Meters: 1953.00000.

Hermosillo, Sonora: 29.066063, -110.944939: : 10/9/2024: Jose Romero: 9 Oct 2024 ; Coordinate Uncertainty in Meters: 196.00000.

Hermosillo, Sonora: 29.063175, -110.941722: : 10/6/2024: Jose Romero: 6 Oct 2024 ; Coordinate Uncertainty in Meters: 1938.00000.

Hermosillo, Sonora: 28.991348, -111.775112: : 8/19/2017: Gert Jan Verspui: 19 Aug 2017 ; Coordinate Uncertainty in Meters: 27392.00000.

Nogales, Arizona: 31.21255, -111.038247: : 8/15/2017: wasatch_hunter: 15 Aug 2017 ; Coordinate Uncertainty in Meters: 29252.00000.

Guerrero, Chihuahua: 28.166179, -107.481981: : 7/5/2023: papigochic4: 5 Jul 2023 ; Coordinate Uncertainty in Meters: 408.00000.

Occurrence Remarks: Encontrada dentro del ├írea protegida de tutuaca; Coordinate Uncertainty in Meters: 31.00000.

Ocampo, Chihuahua: 28.21138, -108.216325: : 9/8/2023: srchepo08: 8 Sep 2023 ; Coordinate Uncertainty in Meters: 2000.00000.

Occurrence Remarks: Maria Teresa Morales Jim├⌐nez; Coordinate Uncertainty in Meters: 29508.00000.

Balleza, Chihuahua: 26.518646, -106.427659: : 7/16/2017: Alejandro Sigala Ch├ívez: 16 Jul 2017 ; Coordinate Uncertainty in Meters: 61.00000.

Balleza, Chihuahua: 26.51926, -106.428389: : 7/16/2017: Alejandro Sigala Ch├ívez: 16 Jul 2017 ; Coordinate Uncertainty in Meters: 61.00000.

Guerrero, Chihuahua: 28.120862, -107.537912: : 8/27/2008: R_Rodr├¡guez: 27 Aug 2008 ; Coordinate Uncertainty in Meters: 244.00000.

Ocampo, Chihuahua: 28.131892, -108.223331: : 9/9/2023: Ram├│n Isaac Miramontes Cinco: 9 Sep 2023 ; Coordinate Uncertainty in Meters: 29656.00000.

Occurrence Remarks: 2010 Southeast Arizona Herping Trip; Coordinate Uncertainty in Meters: 29252.00000.

Cananea, Sonora: 30.989765, -110.289179: : 5/5/2025: Diego Cebrero: 5 May 2025 ; Coordinate Uncertainty in Meters: 4373.00000.

Occurrence Remarks: V├¡bora de Cascabel; Coordinate Uncertainty in Meters: 0.11000.

Chihuahua, Chihuahua: 28.798502, -106.466532: : 9/9/2014: Alejandra Pe├▒a Estrada: 9 Sep 2014 ; Coordinate Uncertainty in Meters: 464.00000.

Chihuahua, Chihuahua: 28.636796, -106.154113: : 11/24/2018: Olalla ├üvila: 24 Nov 2018 ; Coordinate Uncertainty in Meters: 4.00000.

Agua Prieta, Sonora: 31.28183, -109.002525: : 5/24/2025: Eric Hough: 24 May 2025 ; Coordinate Uncertainty in Meters: 10.00000.

Occurrence Remarks: Maria Teresa Morales Jim├⌐nez; Coordinate Uncertainty in Meters: 29483.00000.

Coyame del Sotol, Chihuahua: 30.271341, -105.181812: : 9/10/2021: cylopez: 10 Sep 2021 ; Coordinate Uncertainty in Meters: 1000000.00000.

Occurrence Remarks: Andrea Morales Jim├⌐nez; Coordinate Uncertainty in Meters: 29483.00000.

Casas Grandes, Chihuahua: 29.913345, -107.991934: : 8/12/2014: Carmen Garc├¡a Ch├ívez: 12 Aug 2014 ; Coordinate Uncertainty in Meters: 977.00000.

Madera, Chihuahua: 29.720272, -108.029731: : 5/4/2024: Abel guerrero: 4 May 2024 ; Coordinate Uncertainty in Meters: 29458.00000.

Santiago Papasquiaro, Durango: 24.824164, -106.010767: : 10/6/2023: Richard S├ínchez: 6 Oct 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Guaymas, Sonora: 27.956447, -110.969322: : 6/12/2025: Manuel Maga├▒a: 12 Jun 2025 ; Coordinate Uncertainty in Meters: 17.00000.

Ocampo, Chihuahua: 28.161805, -108.209607: : 10/11/2023: Alejandra Pe├▒a Estrada: 11 Oct 2023 ; Coordinate Uncertainty in Meters: 481.00000.

Otaez, Durango: 24.848958, -105.966261: : 10/17/2023: Richard S├ínchez: 17 Oct 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Namiquipa, Chihuahua: 29.194173, -106.581223: : 7/27/2024: Ram├│n Isaac Miramontes Cinco: 27 Jul 2024 ; Coordinate Uncertainty in Meters: 29533.00000.

Chihuahua, Chihuahua: 29.130319, -106.479619: : 7/27/2024: Ram├│n Isaac Miramontes Cinco: 27 Jul 2024 ; Coordinate Uncertainty in Meters: 29533.00000.

Chihuahua, Chihuahua: 29.069995, -106.421303: : 7/27/2024: Ram├│n Isaac Miramontes Cinco: 27 Jul 2024 ; Coordinate Uncertainty in Meters: 29533.00000.

Ocampo, Chihuahua: 28.318518, -108.256371: : 10/11/2023: Alejandra Pe├▒a Estrada: 11 Oct 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Temosachic, Chihuahua: 28.44805, -108.278022: : 10/11/2023: Carlos G Velazco-Macias: 11 Oct 2023 ; Coordinate Uncertainty in Meters: 5.00000.

Guadalupe y Calvo, Chihuahua: 26.014725, -106.520992: : 6/28/2024: Alvaro Puerta Corrales: 28 Jun 2024 ; Coordinate Uncertainty in Meters: 1169.00000.

Ocampo, Chihuahua: 28.142185, -108.23346: : 4/12/2024: Carlos G Velazco-Macias: 12 Apr 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Ocampo, Chihuahua: 28.142402, -108.233806: : 4/12/2024: Alejandra Pe├▒a Estrada: 12 Apr 2024 ; Coordinate Uncertainty in Meters: 9.00000.

Occurrence Remarks: Vida silvestre.; Coordinate Uncertainty in Meters: 244.00000.

Guachochi, Chihuahua: 26.866671, -107.374489: : 8/26/2014: Alejandro Sigala Ch├ívez: 26 Aug 2014 ; Coordinate Uncertainty in Meters: 31.00000.

Bocoyna, Chihuahua: 27.718764, -107.481887: : 10/22/2013: Alejandro Sigala Ch├ívez: 22 Oct 2013 ; Coordinate Uncertainty in Meters: 488.00000.

Guachochi, Chihuahua: 26.725708, -107.308311: : 7/16/2014: Alejandro Sigala Ch├ívez: 16 Jul 2014 ; Coordinate Uncertainty in Meters: 122.00000.

Guadalupe y Calvo, Chihuahua: 26.143253, -106.517113: : 8/20/2023: Alonso G.A.: 20 Aug 2023 ; Coordinate Uncertainty in Meters: 4.00000.

Lerdo, Durango: 25.653553, -103.707364: : 11/5/2023: aidenhk: 5 Nov 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Two of em. Prolly tryna fuck. On top of a pile of Quercus emoryii logs; Coordinate Uncertainty in Meters: 0.11000.

San Felipe de Jesus, Sonora: 29.878151, -110.388145: : 8/4/2019: Joey Santore: 4 Aug 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Hermosillo, Sonora: 29.174946, -111.901932: : 4/8/2016: bepartida11: 8 Apr 2016 ; Coordinate Uncertainty in Meters: 3715.00000.

Agua Prieta, Sonora: 31.10373, -108.802591: : 7/26/2019: brandon_dietrich: 26 Jul 2019 ; Coordinate Uncertainty in Meters: 29278.00000.

Chihuahua, Chihuahua: 28.826027, -106.435461: : 10/2/2014: Alejandra Pe├▒a Estrada: 2 Oct 2014 ; Coordinate Uncertainty in Meters: 464.00000.

Hermosillo, Sonora: 29.167484, -110.913298: : 9/19/2019: Karla Rodr├¡guez Brise├▒o: 19 Sep 2019 ; Coordinate Uncertainty in Meters: 175.00000.

Uruachi, Chihuahua: 27.848532, -108.612596: : 8/31/2013: Alejandro Sigala Ch├ívez: 31 Aug 2013 ; Coordinate Uncertainty in Meters: 200.00000.

Guaymas, Sonora: 27.983345, -111.095535: : 10/5/2019: Usvaldo GC: 5 Oct 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Una cascabel durmiendo bajo una roca, dejamos una se├▒al de advertencia en el sitio, ojal├í se tomara conciencia de respetar estos animales.; Coordinate Uncertainty in Meters: 115.00000.

Guaymas, Sonora: 27.994253, -111.032822: : 9/20/2019: Usvaldo GC: 20 Sep 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Imuris, Sonora: 30.871186, -110.742121: : 7/23/2016: Sky Island Alliance: 23 Jul 2016 ; Coordinate Uncertainty in Meters: 9.00000.

Yecora, Sonora: 28.383635, -108.879245: : 8/29/2017: Gert Jan Verspui: 29 Aug 2017 ; Coordinate Uncertainty in Meters: 3835.00000.

Guaymas, Sonora: 27.995157, -111.036324: : 2/12/2020: Usvaldo GC: 12 Feb 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Yecora, Sonora: 28.387801, -108.770938: : 8/29/2017: Gert Jan Verspui: 29 Aug 2017 ; Coordinate Uncertainty in Meters: 8728.00000.

Fronteras, Sonora: 30.726767, -109.821148: : 8/16/2016: Diego Barrales: 16 Aug 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Agua Prieta, Sonora: 31.19278, -108.94111: : 4/23/2017: Cecilia Aguilar M: 23 Apr 2017 ; Coordinate Uncertainty in Meters: 4.00000.

Sahuaripa, Sonora: 28.603927, -108.758413: : 5/10/2015: Karl Hawkman Drakulfeith: 10 May 2015 ; Coordinate Uncertainty in Meters: 0.11000.

Hermosillo, Sonora: 28.287733, -111.402061: : 12/5/2015: Omar Calva: 5 Dec 2015 ; Coordinate Uncertainty in Meters: 140.00000.

San Miguel de Horcasitas, Sonora: 29.591381, -110.799892: : 9/18/2015: Omar Calva: 18 Sep 2015 ; Coordinate Uncertainty in Meters: 343.00000.

San Miguel de Horcasitas, Sonora: 29.591381, -110.799892: : 7/17/2015: Omar Calva: 17 Jul 2015 ; Coordinate Uncertainty in Meters: 343.00000.

Hermosillo, Sonora: 29.146868, -110.948186: : 7/25/2020: David Madriz-Valdovinos: 25 Jul 2020 ; Coordinate Uncertainty in Meters: 253.00000.

Hermosillo, Sonora: 29.14882, -110.945397: : 9/16/2020: Esteban Gast├⌐lum Leyva: 16 Sep 2020 ; Coordinate Uncertainty in Meters: 5.00000.

Bacoachi, Sonora: 30.779779, -110.024122: : 9/22/2020: Jessica M. Rupit: 22 Sep 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Cananea, Sonora: 30.899197, -110.327876: : 9/22/2020: Iv├ín Zurita: 22 Sep 2020 ; Coordinate Uncertainty in Meters: 244.00000.

Guaymas, Sonora: 28.522371, -110.325311: : 10/14/2020: gambusino: 14 Oct 2020 ; Coordinate Uncertainty in Meters: 8.00000.

Occurrence Remarks: Esta v├¡bora de cascabel fue vista subiendo a un arbusto alrededor de las 22 h de la noche. Al detectarnos, se qued├│ trepada en el arbusto. Para mi fue y es una conducta s├║per interesante, ya que por lo general cre├¡a que las v├¡boras de cascabel reptaban o permanec├¡an en cuevas, y no en arbustos. Total, hay que tener mucho cuidado d├│nde uno pisa en el desierto de noche. Uno puede pensar que andar entre arbustos podr├¡a ser el lugar menos esperado para que aceche una cascabel.; Coordinate Uncertainty in Meters: 117.00000.

Occurrence Remarks: Liberacion de Cascabel cola negra.; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Rescate y Liberacion de fauna en Mina Mulatos por parte del departamento Ambiental.; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Rescate que se realizo en taller de Mina Mulatos en media noche.; Coordinate Uncertainty in Meters: 1.00000.

Nacozari de Garcia, Sonora: 30.28306, -109.58972: : 8/13/2017: Anays Blanco: 13 Aug 2017 ; Coordinate Uncertainty in Meters: 1.11000.

Sahuaripa, Sonora: 28.639576, -108.761889: : 9/30/2017: Eric Centenero Alcal├í: 30 Sep 2017 ; Coordinate Uncertainty in Meters: 7000.00000.

Nacozari de Garcia, Sonora: 30.253877, -109.533933: : 8/18/2017: Colectivo Sonora Silvestre: 18 Aug 2017 ; Coordinate Uncertainty in Meters: 1953.00000.

Magdalena, Sonora: 30.568764, -110.990753: : 4/5/2017: Casablancas Daniel: 5 Apr 2017 ; Coordinate Uncertainty in Meters: 1014.00000.

Agua Prieta, Sonora: 31.269062, -109.459038: : 9/12/2025: Neil Balchan: 12 Sep 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Agua Prieta, Sonora: 31.081303, -109.058651: : 8/17/2017: Rigo Granillo: 17 Aug 2017 ; Coordinate Uncertainty in Meters: 79.00000.

Hermosillo, Sonora: 29.156367, -110.962959: : 8/2/2021: Fabi├ín Urias Vel├ízquez: 2 Aug 2021 ; Coordinate Uncertainty in Meters: 39.00000.

Nogales, Arizona: 31.228034, -111.137397: : 9/4/2021: James Bailey: 4 Sep 2021 ; Coordinate Uncertainty in Meters: 29252.00000.

Occurrence Remarks: La encontramos en la cima del tetakawi; Coordinate Uncertainty in Meters: 512.00000.

Hermosillo, Sonora: 29.15269, -110.965934: : 10/21/2021: Uriel: 21 Oct 2021 ; Coordinate Uncertainty in Meters: 42.00000.

Guaymas, Sonora: 27.957737, -110.970222: : 3/15/2025: Manuel Maga├▒a: 15 Mar 2025 ; Coordinate Uncertainty in Meters: 7.00000.

Arizpe, Sonora: 30.519896, -110.191768: : 8/27/2017: Pedro N├íjera Quezada: 27 Aug 2017 ; Coordinate Uncertainty in Meters: 61.00000.

Badiraguato, Sinaloa: 25.687955, -107.061599: : 8/25/2020: Sinaloa Silvestre: 25 Aug 2020 ; Coordinate Uncertainty in Meters: 21209.00000.

Hermosillo, Sonora: 29.170524, -110.951099: : 6/25/2015: Oscar Leonardo Chavez Torres: 25 Jun 2015 ; Coordinate Uncertainty in Meters: 122.00000.

Caborca, Sonora: 30.258167, -112.362917: : 6/24/2022: Andr├⌐s Verver: 24 Jun 2022 ; Coordinate Uncertainty in Meters: 198.00000.

Guaymas, Sonora: 27.888861, -110.941147: : 4/9/2019: Manuel Maga├▒a: 9 Apr 2019 ; Coordinate Uncertainty in Meters: 349.00000.

Saltillo, Coahuila: 25.230158, -101.020982: : 7/28/2015: Sergio Marines: 28 Jul 2015 ; Coordinate Uncertainty in Meters: 104.00000.

Casas Grandes, Chihuahua: 29.999216, -108.192296: : 7/13/2020: okanipg: 13 Jul 2020 ; Coordinate Uncertainty in Meters: 88.00000.

Hermosillo, Sonora: 29.050953, -112.14028: : 11/12/2025: Desert Max: 12 Nov 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Nuevo Leon: 25.657888, -100.762458: : 4/25/2026: Tury AM: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Ocampo, Chihuahua: 28.195081, -108.374297: : 11/8/2025: babonoyaba: 8 Nov 2025 ; Coordinate Uncertainty in Meters: 31.00000.

Ocampo, Chihuahua: 28.195578, -108.374361: : 11/8/2025: babonoyaba: 8 Nov 2025 ; Coordinate Uncertainty in Meters: 527.00000.

San Felipe de Jesus, Sonora: 29.848964, -110.246769: : 6/3/2023: Diego Barrales: 3 Jun 2023 ; Coordinate Uncertainty in Meters: 122.00000.

Occurrence Remarks: Es una especie de v├¡bora venenosa que se encuentra en el suroeste de Estados Unidos y M├⌐xico. Actualmente se reconocen cuatro subespecies incluida la subespecie nominada que se escribe aqu├¡. Distribuci├│n: Habita en Arizona, Nuevo M├⌐xico, oeste de Texas, Sonora, norte de Chihuahua y Coahuila. H├íbitat: Habita en ├íreas rocosas, en bosques, sabanas, chaparrales y desiertos .Aunque no habita en planicies costeras se le ha registrado a altitudes de 500 a 700 m y hasta 2300 m sobre el nivel del mar. Alimentaci├│n: Los roedores constituyen su principal presa, las aves pueden comprender hasta el 17% de su dieta. Los individuos peque├▒os probablemente se alimentan de lagartijas. Esta especie se encuentra sujeta a Protecci├│n especial segun la nom 059 ecol 2001 semarnat.; Coordinate Uncertainty in Meters: 1395.00000.

Hermosillo, Sonora: 29.150042, -110.937828: : 7/7/2019: celsoharos: 7 Jul 2019 ; Coordinate Uncertainty in Meters: 10.00000.

Sahuaripa, Sonora: 28.617438, -108.746063: : 9/5/2020: Jonathan Rodriguez: 5 Sep 2020 ; Coordinate Uncertainty in Meters: 7813.00000.

Occurrence Remarks: Tomada por personal de Medio Ambiente en Mina Mulatos Sonora.; Coordinate Uncertainty in Meters: 1.00000.

Occurrence Remarks: Tomada por personal de Medio Ambiente en Mina Mulatos Sonora.; Coordinate Uncertainty in Meters: 0.11000.

Sahuaripa, Sonora: 28.681392, -108.827283: : 9/6/2016: JESUSTAPIA2: 6 Sep 2016 ; Coordinate Uncertainty in Meters: 244.00000.

Occurrence Remarks: Al liberarla se metio en el rin del carro. Mina Mulatos Sonora.; Coordinate Uncertainty in Meters: 1953.00000.

Occurrence Remarks: Despues de liberarse, se fue a meter a un rin del carro en el que la llevamos.; Coordinate Uncertainty in Meters: 1.00000.

Sahuaripa, Sonora: 28.628796, -108.757467: : 9/14/2014: JESUSTAPIA2: 14 Sep 2014 ; Coordinate Uncertainty in Meters: 1.00000.

Occurrence Remarks: Despues de liberarse, se fue a meter a un rin del carro en el que la llevamos. Mina Mulatos; Coordinate Uncertainty in Meters: 1.00000.

Sahuaripa, Sonora: 28.628799, -108.757507: : 8/10/2020: JESUSTAPIA2: 10 Aug 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Sahuaripa, Sonora: 28.628818, -108.757479: : 8/9/2013: JESUSTAPIA2: 9 Aug 2013 ; Coordinate Uncertainty in Meters: 1.00000.

Sahuaripa, Sonora: 28.628823, -108.757518: : 8/30/2020: JESUSTAPIA2: 30 Aug 2020 ; Coordinate Uncertainty in Meters: 1.00000.

Casas Grandes, Chihuahua: 30.301172, -108.225217: : 7/17/2019: Ismael: 17 Jul 2019 ; Coordinate Uncertainty in Meters: 244.00000.

Unknown, Sonora: 29.063803, -110.942833: : 5/19/2026: jorgeortizv: 19 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Sonora: 29.06261, -111.051232: : 5/29/2026: Angel Gonzalez lopez: 29 May 2026 ; Coordinate Uncertainty in Meters: 98.00000.

Unknown, Chihuahua: 29.554115, -108.169001: : 8/17/2025: Miriam Ch├ívez: 17 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Zacatecas: 24.695119, -101.675803: : 6/30/2025: Eric Centenero Alcal├í: 30 Jun 2025 ; Coordinate Uncertainty in Meters: 1500.00000.

Unknown, Coahuila: 25.330204, -100.979477: : 7/27/2025: Arturo Cruz: 27 Jul 2025 ; Coordinate Uncertainty in Meters: 61.00000.

Unknown, Zacatecas: 24.649747, -101.584214: : 6/23/2025: Eric Centenero Alcal├í: 23 Jun 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Saltillo, Coahuila: 25.145563, -101.059671: : 10/1/2020: Eber Chavez: 1 Oct 2020 ; Coordinate Uncertainty in Meters: 119.00000.

Saltillo, Coahuila: 25.136271, -101.044693: : 9/13/2009: altamiranohg: 13 Sep 2009 ; Coordinate Uncertainty in Meters: 1953.00000.

Saltillo, Coahuila: 25.345271, -101.002871: : 6/15/2025: Aldo Gonz├ílez: 15 Jun 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Galeana, Nuevo Leon: 25.17612, -100.432243: : 9/23/2025: fabianmascotas: 23 Sep 2025 ; Coordinate Uncertainty in Meters: 283.00000.

Santiago, Nuevo Leon: 25.428333, -100.237222: : 9/3/2020: Dani: 3 Sep 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 25.393965, -100.893183: : 8/17/2018: Arturo Cruz: 17 Aug 2018 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Sonora: 29.149944, -110.940469: : 4/27/2026: Luis Enrique Vega: 27 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Rattlesnake; Coordinate Uncertainty in Meters: 253.00000.

Unknown, Chihuahua: 28.165133, -108.206216: : 5/4/2026: Jos├⌐ Candelario Hern├índez Alvarez: 4 May 2026 ; Coordinate Uncertainty in Meters: 224.00000.

Occurrence Remarks: DOR adult on Coahuila Hwy 122 nr El Milagro. With Joe Forks (photographer). GTS 347. KU CT 11973. Map point is approximate.; Coordinate Uncertainty in Meters: 29.00000.

Arteaga, Coahuila: 25.407545, -100.80114: : 5/19/2022: BETZABETH ROSALES: 19 May 2022 ; Coordinate Uncertainty in Meters: 1676.00000.

Melchor Ocampo, Zacatecas: 24.706944, -101.670815: : 7/14/2022: Eric Centenero Alcal├í: 14 Jul 2022 ; Coordinate Uncertainty in Meters: 10000.00000.

Melchor Ocampo, Zacatecas: 24.707229, -101.670967: : 7/14/2022: Eric Centenero Alcal├í: 14 Jul 2022 ; Coordinate Uncertainty in Meters: 10000.00000.

Mazapil, Zacatecas: 24.625822, -101.654145: : 7/14/2022: Eric Centenero Alcal├í: 14 Jul 2022 ; Coordinate Uncertainty in Meters: 10000.00000.

Saltillo, Coahuila: 25.340913, -100.999843: : 8/3/2022: Arturo Cruz: 3 Aug 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Torreon, Coahuila: 25.493864, -103.42012: : 9/10/2022: Kevin Daniel Torres Domingue╞╢: 10 Sep 2022 ; Coordinate Uncertainty in Meters: 201.00000.

Saltillo, Coahuila: 25.326265, -100.975877: : 6/28/2018: Arturo Cruz: 28 Jun 2018 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 24.942566, -100.876621: : 7/2/2018: Jovanna Ortiz Llanas: 2 Jul 2018 ; Coordinate Uncertainty in Meters: 0.11000.

Santiago, Nuevo Leon: 25.429016, -100.236742: : 9/3/2020: Dani: 3 Sep 2020 ; Coordinate Uncertainty in Meters: 27.00000.

Saltillo, Coahuila: 25.342452, -101.024673: : 8/7/2018: Arturo Cruz: 7 Aug 2018 ; Coordinate Uncertainty in Meters: 0.11000.

El Carmen, Nuevo Leon: 25.934347, -100.358686: : 4/30/2023: nana: 30 Apr 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Arteaga, Coahuila: 25.391663, -100.797323: : 8/29/2018: Arturo Cruz: 29 Aug 2018 ; Coordinate Uncertainty in Meters: 0.11000.

Arteaga, Coahuila: 25.197504, -100.366653: : 5/6/2023: Raul Eduardo Gamez Benavides: 6 May 2023 ; Coordinate Uncertainty in Meters: 1216.00000.

Saltillo, Coahuila: 25.338284, -100.997291: : 5/4/2023: Aldo Gonz├ílez: 4 May 2023 ; Coordinate Uncertainty in Meters: 159.00000.

Occurrence Remarks: Ejemplar de 40 cm aprox. de Crotalus molossus.; Coordinate Uncertainty in Meters: 96.00000.

Santa Catarina, Nuevo Leon: 25.473548, -100.25975: : 8/21/2012: Bernardo Marino Maldonado: 21 Aug 2012 ; Coordinate Uncertainty in Meters: 14.00000.

Saltillo, Coahuila: 25.338938, -100.998145: : 7/14/2023: Aldo Gonz├ílez: 14 Jul 2023 ; Coordinate Uncertainty in Meters: 199.00000.

Saltillo, Coahuila: 25.33763, -100.9916: : 7/18/2023: Aldo Gonz├ílez: 18 Jul 2023 ; Coordinate Uncertainty in Meters: 527.00000.

Matamoros, Coahuila: 25.601584, -103.189135: : 8/26/2023: Juanma: 26 Aug 2023 ; Coordinate Uncertainty in Meters: 1318.00000.

Galeana, Nuevo Leon: 24.844889, -100.14728: : 7/23/2023: Carlos Garc├¡a Casanova: 23 Jul 2023 ; Coordinate Uncertainty in Meters: 217.00000.

Occurrence Remarks: Foto tomada por compa├▒ero; Coordinate Uncertainty in Meters: 0.11000.

Mazapil, Zacatecas: 24.547525, -101.646772: : 11/23/2018: Yabal Alfaro Castillo: 23 Nov 2018 ; Coordinate Uncertainty in Meters: 122.00000.

Matamoros, Coahuila: 25.604943, -103.190099: : 11/2/2023: Juanma: 2 Nov 2023 ; Coordinate Uncertainty in Meters: 930.00000.

Rayones, Nuevo Leon: 25.209678, -100.161388: : 8/23/2015: Ramiro Gonzalez: 23 Aug 2015 ; Coordinate Uncertainty in Meters: 120.00000.

Matamoros, Coahuila: 25.604049, -103.188913: : 9/26/2019: Juanma: 26 Sep 2019 ; Coordinate Uncertainty in Meters: 15.00000.

Saltillo, Coahuila: 25.279265, -100.956829: : 9/16/2004: RODOLFO PINEDA P├ëREZ: 16 Sep 2004 ; Coordinate Uncertainty in Meters: 8.00000.

Arteaga, Coahuila: 25.215235, -100.378293: : 5/3/2024: juancortes95: 3 May 2024 ; Coordinate Uncertainty in Meters: 135.00000.

Mazapil, Zacatecas: 24.675987, -101.683436: : 5/1/2024: Eric Centenero Alcal├í: 1 May 2024 ; Coordinate Uncertainty in Meters: 2.00000.

Galeana, Nuevo Leon: 24.917958, -100.518272: : 7/10/2024: juanjoseromero: 10 Jul 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Melchor Ocampo, Zacatecas: 24.701536, -101.672672: : 7/9/2024: Eric Centenero Alcal├í: 9 Jul 2024 ; Coordinate Uncertainty in Meters: 499.00000.

Arteaga, Coahuila: 25.217975, -100.817517: : 7/29/2024: Silvino Eduardo: 29 Jul 2024 ; Coordinate Uncertainty in Meters: 29981.00000.

Saltillo, Coahuila: 25.192465, -101.06725: : 7/5/2024: Aldo Gonz├ílez: 5 Jul 2024 ; Coordinate Uncertainty in Meters: 14.00000.

Saltillo, Coahuila: 25.283671, -100.964668: : 7/29/2024: Juan Cruzado Cort├⌐s: 29 Jul 2024 ; Coordinate Uncertainty in Meters: 1032.00000.

Saltillo, Coahuila: 25.057843, -101.066365: : 8/27/2024: Aldo Gonz├ílez: 27 Aug 2024 ; Coordinate Uncertainty in Meters: 123.00000.

Galeana, Nuevo Leon: 24.675863, -100.294548: : 7/17/2023: Devany Gonz├ílez: 17 Jul 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 25.287257, -101.15768: : 9/14/2024: Magda G├│mez: 14 Sep 2024 ; Coordinate Uncertainty in Meters: 224.00000.

Galeana, Nuevo Leon: 24.896439, -100.211999: : 6/26/2019: Ricardo Jaimes-L├│pez: 26 Jun 2019 ; Coordinate Uncertainty in Meters: 122.00000.

Mazapil, Zacatecas: 24.565419, -102.172862: : 8/14/2024: Chiki Camarillo: 14 Aug 2024 ; Coordinate Uncertainty in Meters: 1253.00000.

Occurrence Remarks: Muerta en el camino.; Coordinate Uncertainty in Meters: 0.11000.

General Cepeda, Coahuila: 25.1988, -101.505638: : 4/21/2025: David Mercado-Morales: 21 Apr 2025 ; Coordinate Uncertainty in Meters: 7.00000.

Occurrence Remarks: Atropellada; Coordinate Uncertainty in Meters: 6.00000.

Saltillo, Coahuila: 25.337849, -100.999831: : 7/6/2024: Sergio Marines: 6 Jul 2024 ; Coordinate Uncertainty in Meters: 77.00000.

Saltillo, Coahuila: 25.335797, -100.991119: : 9/3/2015: Sergio Marines: 3 Sep 2015 ; Coordinate Uncertainty in Meters: 140.00000.

Galeana, Nuevo Leon: 24.937672, -100.722886: : 5/30/2019: Manlio Mart├¡nez Barona: 30 May 2019 ; Coordinate Uncertainty in Meters: 5.00000.

Saltillo, Coahuila: 25.330239, -100.978084: : 6/22/2025: M.C. Luis Miguel Toribio Ferrer: 22 Jun 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Saltillo, Coahuila: 25.33939, -100.998806: : 6/15/2025: Pedro Guevara: 15 Jun 2025 ; Coordinate Uncertainty in Meters: 39.00000.

Mazapil, Zacatecas: 24.631942, -101.614309: : 6/24/2025: Eric Centenero Alcal├í: 24 Jun 2025 ; Coordinate Uncertainty in Meters: 1953.00000.

Occurrence Remarks: Sobre el camino de terraceria, muy cerca de parcelas de ma├¡z; Coordinate Uncertainty in Meters: 120.00000.

Arteaga, Coahuila: 25.323554, -100.77815: : 8/11/2019: troi_olivares: 11 Aug 2019 ; Coordinate Uncertainty in Meters: 977.00000.

Parras, Coahuila: 25.325172, -102.599163: : 8/14/2019: troi_olivares: 14 Aug 2019 ; Coordinate Uncertainty in Meters: 15625.00000.

Arteaga, Coahuila: 25.41692, -100.815182: : 8/16/2008: Zona Sujeta a Conservaci├│n Ecol├│gica Sierra de Zapalinam├⌐: 16 Aug 2008 ; Coordinate Uncertainty in Meters: 959.00000.

Occurrence Remarks: cascabel cola negra; Coordinate Uncertainty in Meters: 50.00000.

Occurrence Remarks: Cascabel de cola negra; Coordinate Uncertainty in Meters: 50.00000.

Saltillo, Coahuila: 25.279563, -100.956372: : 7/24/2016: Arturo Cruz: 24 Jul 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 25.328511, -100.980148: : 7/24/2013: Zona Sujeta a Conservaci├│n Ecol├│gica Sierra de Zapalinam├⌐: 24 Jul 2013 ; Coordinate Uncertainty in Meters: 977.00000.

Saltillo, Coahuila: 25.28987, -100.938263: : 9/28/2011: Zona Sujeta a Conservaci├│n Ecol├│gica Sierra de Zapalinam├⌐: 28 Sep 2011 ; Coordinate Uncertainty in Meters: 122.00000.

Saltillo, Coahuila: 25.304925, -100.939293: : 5/27/2012: Zona Sujeta a Conservaci├│n Ecol├│gica Sierra de Zapalinam├⌐: 27 May 2012 ; Coordinate Uncertainty in Meters: 488.00000.

Arteaga, Coahuila: 25.259717, -100.848012: : 9/28/2015: Zona Sujeta a Conservaci├│n Ecol├│gica Sierra de Zapalinam├⌐: 28 Sep 2015 ; Coordinate Uncertainty in Meters: 31.00000.

Saltillo, Coahuila: 25.33494, -100.992175: : 8/11/2016: Zona Sujeta a Conservaci├│n Ecol├│gica Sierra de Zapalinam├⌐: 11 Aug 2016 ; Coordinate Uncertainty in Meters: 15.00000.

Saltillo, Coahuila: 25.337503, -100.995984: : 7/15/2019: Zona Sujeta a Conservaci├│n Ecol├│gica Sierra de Zapalinam├⌐: 15 Jul 2019 :
Occurrence Remarks: Observaci├│n y fotos: Griselda Carmona; Coordinate Uncertainty in Meters: 31.00000.

Arteaga, Coahuila: 25.288103, -100.550414: : 7/10/2016: Fernando Toledo y Ana Karen Fernandez: 10 Jul 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Arteaga, Nuevo Leon: 25.23965, -100.424508: : 5/16/2015: Michael Price: 16 May 2015 ; Coordinate Uncertainty in Meters: 29981.00000.

Occurrence Remarks: Photo by B.Stupavsky; Coordinate Uncertainty in Meters: 29981.00000.

Occurrence Remarks: Nunca hizo sonar el cascabel, ni al arrojar ramas para que saliera del camino.; Coordinate Uncertainty in Meters: 250.00000.

Occurrence Remarks: Jam├ís hizo sonar el cascabel; Coordinate Uncertainty in Meters: 357.00000.

Mazapil, Zacatecas: 24.540573, -101.596159: : 6/27/2020: Yabal Alfaro Castillo: 27 Jun 2020 ; Coordinate Uncertainty in Meters: 2840.00000.

Occurrence Remarks: Foto compartida por mi amigo Ivan Castillon; Coordinate Uncertainty in Meters: 107.00000.

Mazapil, Zacatecas: 24.645128, -101.949197: : 8/29/2019: Eric Centenero Alcal├í: 29 Aug 2019 ; Coordinate Uncertainty in Meters: 4927.00000.

Melchor Ocampo, Zacatecas: 24.72497, -101.675244: : 2/26/2020: Eric Centenero Alcal├í: 26 Feb 2020 ; Coordinate Uncertainty in Meters: 3955.00000.

Melchor Ocampo, Zacatecas: 24.714996, -101.673853: : 8/27/2019: Eric Centenero Alcal├í: 27 Aug 2019 ; Coordinate Uncertainty in Meters: 5947.00000.

Mazapil, Zacatecas: 24.621958, -101.755797: : 8/27/2019: Eric Centenero Alcal├í: 27 Aug 2019 ; Coordinate Uncertainty in Meters: 10956.00000.

Mazapil, Zacatecas: 24.645753, -101.641272: : 8/24/2017: Eric Centenero Alcal├í: 24 Aug 2017 ; Coordinate Uncertainty in Meters: 5000.00000.

Melchor Ocampo, Zacatecas: 24.897908, -102.031897: : 8/21/2017: Eric Centenero Alcal├í: 21 Aug 2017 ; Coordinate Uncertainty in Meters: 10127.00000.

Melchor Ocampo, Zacatecas: 24.710307, -101.676472: : 8/29/2019: Eric Centenero Alcal├í: 29 Aug 2019 ; Coordinate Uncertainty in Meters: 3000.00000.

Mazapil, Zacatecas: 24.641041, -101.636642: : 9/23/2016: Eric Centenero Alcal├í: 23 Sep 2016 ; Coordinate Uncertainty in Meters: 5000.00000.

Mazapil, Zacatecas: 24.651923, -101.619476: : 9/23/2016: Eric Centenero Alcal├í: 23 Sep 2016 ; Coordinate Uncertainty in Meters: 5481.00000.

Melchor Ocampo, Zacatecas: 24.897167, -102.028252: : 6/22/2015: Eric Centenero Alcal├í: 22 Jun 2015 ; Coordinate Uncertainty in Meters: 6000.00000.

Arteaga, Coahuila: 25.319603, -100.829835: : 7/26/2017: Arturo Cruz: 26 Jul 2017 ; Coordinate Uncertainty in Meters: 0.11000.

Santiago, Nuevo Leon: 25.289181, -100.241334: : 8/28/2017: Guillermo Rodriguez: 28 Aug 2017 ; Coordinate Uncertainty in Meters: 30.00000.

Melchor Ocampo, Zacatecas: 24.690404, -101.661445: : 9/7/2015: Eric Centenero Alcal├í: 7 Sep 2015 ; Coordinate Uncertainty in Meters: 8000.00000.

Arteaga, Coahuila: 25.441933, -100.720321: : 5/9/2021: luispastranamx: 9 May 2021 ; Coordinate Uncertainty in Meters: 1305.00000.

Melchor Ocampo, Zacatecas: 24.706539, -101.67209: : 6/4/2021: Eric Centenero Alcal├í: 4 Jun 2021 ; Coordinate Uncertainty in Meters: 25000.00000.

Mazapil, Zacatecas: 24.645753, -101.639708: : 6/1/2021: Eric Centenero Alcal├í: 1 Jun 2021 ; Coordinate Uncertainty in Meters: 1000.00000.

Occurrence Remarks: Fotograf├¡a: Bi├│loga Melissa Ponce; Coordinate Uncertainty in Meters: 202.00000.

Concepcion del Oro, Zacatecas: 24.728133, -101.255436: : 7/11/2016: ahtziri1204: 11 Jul 2016 ; Coordinate Uncertainty in Meters: 45.00000.

Occurrence Remarks: Bosque de Pinus cembroides; Coordinate Uncertainty in Meters: 61.00000.

Saltillo, Coahuila: 25.370345, -100.925367: : 8/12/2021: Rafael Cardenas: 12 Aug 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 25.370358, -100.925463: : 8/12/2021: Rafael Cardenas: 12 Aug 2021 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 25.335108, -100.992503: : 9/6/2021: Alejandra Zamarripa: 6 Sep 2021 ; Coordinate Uncertainty in Meters: 12.00000.

Saltillo, Coahuila: 25.335359, -100.992755: : 9/4/2021: Arturo Cruz: 4 Sep 2021 ; Coordinate Uncertainty in Meters: 15.00000.

Occurrence Remarks: Photo might not nail down ID, but I had great looks before it moved off under cover.; Coordinate Uncertainty in Meters: 4907.00000.

Chihuahua, Chihuahua: 28.798744, -106.485001: : 9/22/2025: Cielo Aragon: 22 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Durango: 25.060306, -104.959839: : 10/20/2025: Jesus Emmanuel: 20 Oct 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Saltillo, Coahuila: 25.11672, -101.027396: : 9/14/2025: Jos├⌐ Antonio Hern├índez Herrera: 14 Sep 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Saltillo, Coahuila: 25.116764, -101.027418: : 9/14/2025: Jos├⌐ Antonio Hern├índez Herrera: 14 Sep 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Ocampo, Chihuahua: 28.198546, -108.449659: : 9/20/2025: babonoyaba: 20 Sep 2025 ; Coordinate Uncertainty in Meters: 15.00000.

Mazapil, Zacatecas: 24.626799, -101.76889: : 9/19/2025: betorquato: 19 Sep 2025 ; Coordinate Uncertainty in Meters: 61.00000.

Unknown, Chihuahua: 28.17295, -108.403212: : 5/15/2026: babonoyaba: 15 May 2026 ; Coordinate Uncertainty in Meters: 1344.00000.

Unknown, Nuevo Leon: 24.871349, -100.294698: : 4/4/2026: saucedoaldo: 4 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Guerrero, Chihuahua: 28.403143, -107.793667: : 7/1/2025: otonielval: 1 Jul 2025 ; Coordinate Uncertainty in Meters: 439.00000.

Unknown, Chihuahua: 28.106611, -107.943917: : 7/2/2026: Alejandro Flores-Becerril.: 2 Jul 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Sonora: 27.957683, -110.970253: : 6/4/2026: daniel cota: 4 Jun 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Chihuahua: 29.19496, -106.219413: : 6/13/2026: wildleoph: 13 Jun 2026 ; Coordinate Uncertainty in Meters: 71557.00000.

Torreon, Coahuila: 25.104211, -103.333162: : 9/25/2025: Fernando E. Machuca: 25 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Durango: 24.538354, -104.291654: : 6/26/2026: jacqueline: 26 Jun 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Saltillo, Coahuila: 25.116716, -101.027375: : 9/14/2025: Jos├⌐ Antonio Hern├índez Herrera: 14 Sep 2025 ; Coordinate Uncertainty in Meters: 61.00000.

Chihuahua, Chihuahua: 28.725169, -106.227578: : 10/4/2025: rustedshrooms: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Chihuahua, Chihuahua: 28.725344, -106.231072: : 10/4/2025: rustedshrooms: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Cusihuiriachi, Chihuahua: 28.247725, -106.857265: : 9/29/2025: Chris Lloyd: 29 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 25.337948, -100.99682: : 9/9/2022: Arturo Cruz: 9 Sep 2022 ; Coordinate Uncertainty in Meters: 61.00000.

Cananea, Sonora: 31.029404, -110.168668: : 9/15/2022: babonoyaba: 15 Sep 2022 ; Coordinate Uncertainty in Meters: 977.00000.

Arizpe, Sonora: 30.37565, -110.35877: : 5/2/2011: Mark Fishbein: 2 May 2011 ; Coordinate Uncertainty in Meters: 50.00000.

Saltillo, Coahuila: 25.328696, -100.985423: : 9/28/2025: Aldo Gonz├ílez: 28 Sep 2025 ; Coordinate Uncertainty in Meters: 261.00000.

Saltillo, Coahuila: 25.338335, -100.965214: : 9/28/2025: Aldo Gonz├ílez: 28 Sep 2025 ; Coordinate Uncertainty in Meters: 30.00000.

Santa Catarina, Nuevo Leon: 25.606501, -100.50313: : 10/10/2025: Samuel Cardona Garza: 10 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Saltillo, Coahuila: 25.340633, -100.999822: : 9/24/2025: Aldo Gonz├ílez: 24 Sep 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Guaymas, Sonora: 28.015689, -111.056197: : 11/7/2025: Claudia A.: 7 Nov 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Saltillo, Coahuila: 25.323332, -100.981789: : 9/9/2011: hectorprieto: 9 Sep 2011 ; Coordinate Uncertainty in Meters: 15.00000.

Matamoros, Coahuila: 25.604458, -103.191741: : 3/7/2023: Juanma: 7 Mar 2023 ; Coordinate Uncertainty in Meters: 566.00000.

Saltillo, Coahuila: 25.253947, -101.058743: : 5/20/2016: Arturo Cruz: 20 May 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Galeana, Nuevo Leon: 24.676196, -100.362415: : 7/17/2023: Francisco Ibarra: 17 Jul 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: In ambush; Coordinate Uncertainty in Meters: 29252.00000.

Guaymas, Sonora: 27.943543, -111.091309: : 8/6/2023: Manuel Maga├▒a: 6 Aug 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Iturbide, Nuevo Leon: 24.774605, -99.891813: : 8/16/2025: D├ívila: 16 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Or hybrid with C. basiliscus?; Coordinate Uncertainty in Meters: 29631.00000.

Mazapil, Zacatecas: 24.62509, -101.981971: : 9/20/2025: betorquato: 20 Sep 2025 ; Coordinate Uncertainty in Meters: 31.00000.

Occurrence Remarks: basiliscus?; Coordinate Uncertainty in Meters: 429.00000.

Guaymas, Sonora: 28.145283, -111.311406: : 5/21/2025: Irma Fernandez Lopez: 21 May 2025 ; Coordinate Uncertainty in Meters: 30.00000.

Occurrence Remarks: Encontrada dentro de instalaciones, reubicada.; Coordinate Uncertainty in Meters: 31.00000.

Occurrence Remarks: Encontrada dentro de instalaciones de un campamento, reubicada; Coordinate Uncertainty in Meters: 61.00000.

Rodeo, Durango: 25.181334, -104.556162: : 3/1/2019: Ivana Guerra: 1 Mar 2019 ; Coordinate Uncertainty in Meters: 821.00000.

Janos, Chihuahua: 31.038999, -108.60584: : 9/29/2015: Jesus Vadillo: 29 Sep 2015 ; Coordinate Uncertainty in Meters: 1523.00000.

Madera, Chihuahua: 29.10075, -108.233302: : 7/20/2013: Javier Cruz Nieto: 20 Jul 2013 ; Coordinate Uncertainty in Meters: 12.00000.

Temosachic, Chihuahua: 28.68905, -108.274362: : 7/18/2004: Javier Cruz Nieto: 18 Jul 2004 ; Coordinate Uncertainty in Meters: 4.00000.

Temosachic, Chihuahua: 28.689378, -108.274957: : 7/24/2003: Javier Cruz Nieto: 24 Jul 2003 ; Coordinate Uncertainty in Meters: 12.00000.

Ignacio Zaragoza, Chihuahua: 29.511605, -107.578005: : 8/14/2019: Alejandro Colmenero: 14 Aug 2019 ; Coordinate Uncertainty in Meters: 11252.00000.

Lerdo, Durango: 25.451257, -103.4727: : 8/13/2024: sarionions: 13 Aug 2024 ; Coordinate Uncertainty in Meters: 1543.00000.

Namiquipa, Chihuahua: 29.511443, -106.739135: : 8/15/2019: brandon_dietrich: 15 Aug 2019 ; Coordinate Uncertainty in Meters: 29483.00000.

Namiquipa, Chihuahua: 29.45183, -106.883458: : 8/14/2019: brandon_dietrich: 14 Aug 2019 ; Coordinate Uncertainty in Meters: 29483.00000.

Temosachic, Chihuahua: 28.632269, -108.292522: : 8/28/2009: Javier Cruz Nieto: 28 Aug 2009 ; Coordinate Uncertainty in Meters: 14.00000.

Temosachic, Chihuahua: 28.634354, -108.281621: : 8/29/2009: Javier Cruz Nieto: 29 Aug 2009 ; Coordinate Uncertainty in Meters: 12.00000.

Temosachic, Chihuahua: 28.635416, -108.27719: : 7/16/2010: Javier Cruz Nieto: 16 Jul 2010 ; Coordinate Uncertainty in Meters: 14.00000.

Guanacevi, Durango: 25.931836, -106.277946: : 7/17/2019: Cutberto Valencia Barraza: 17 Jul 2019 ; Coordinate Uncertainty in Meters: 119.00000.

Guerrero, Chihuahua: 28.779158, -107.450901: : 8/1/2025: paulina_gardea09: 1 Aug 2025 ; Coordinate Uncertainty in Meters: 1087.00000.

Sahuaripa, Sonora: 28.638158, -108.77665: : 10/3/2017: Eric Centenero Alcal├í: 3 Oct 2017 ; Coordinate Uncertainty in Meters: 5000.00000.

Hermosillo, Sonora: 29.158988, -110.964938: : 3/30/2019: ivansouffle: 30 Mar 2019 ; Coordinate Uncertainty in Meters: 152.00000.

Hermosillo, Sonora: 29.160126, -110.964859: : 3/30/2019: Paloma Montijo: 30 Mar 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Ocampo, Chihuahua: 28.183173, -108.212068: : 7/25/2017: Quetzalita Chiwas: 25 Jul 2017 ; Coordinate Uncertainty in Meters: 370.00000.

Satevo, Chihuahua: 27.521111, -106.265: : 9/3/2015: marsore: 3 Sep 2015 ; Coordinate Uncertainty in Meters: 1924.00000.

Ignacio Zaragoza, Chihuahua: 29.644653, -107.760884: : 10/1/2015: kariigmz: 1 Oct 2015 ; Coordinate Uncertainty in Meters: 2799.00000.

San Dimas, Durango: 24.48542, -105.81969: : 5/31/2019: Silvino: 31 May 2019 ; Coordinate Uncertainty in Meters: 1.11000.

Penon Blanco, Durango: 24.90234, -104.03305: : 8/12/2015: gabinus2003: 12 Aug 2015 ; Coordinate Uncertainty in Meters: 122.00000.

Guaymas, Sonora: 27.957637, -110.971668: : 8/24/2025: Jaime R Brise├▒o: 24 Aug 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Chihuahua, Chihuahua: 29.076536, -106.424358: : 6/28/2016: ric_ramirez: 28 Jun 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Guadalupe y Calvo, Chihuahua: 26.363333, -107.204444: : 8/5/2015: ric_ramirez: 5 Aug 2015 ; Coordinate Uncertainty in Meters: 0.11000.

Madera, Chihuahua: 28.989861, -108.537905: : 8/23/2016: Mariela Grijalva Zapata: 23 Aug 2016 ; Coordinate Uncertainty in Meters: 15.00000.

Madera, Chihuahua: 28.989867, -108.537915: : 8/23/2016: Mariela Grijalva Zapata: 23 Aug 2016 ; Coordinate Uncertainty in Meters: 2.00000.

Madera, Chihuahua: 28.989876, -108.537904: : 8/23/2016: Mariela Grijalva Zapata: 23 Aug 2016 ; Coordinate Uncertainty in Meters: 2.00000.

Santa Barbara, Chihuahua: 26.801697, -105.820058: : 6/14/2020: Elan Silva: 14 Jun 2020 ; Coordinate Uncertainty in Meters: 2789.00000.

Lerdo, Durango: 25.588982, -103.688197: : 7/29/2020: Daniela Guzm├ín: 29 Jul 2020 ; Coordinate Uncertainty in Meters: 0.11000.

General Cepeda, Coahuila: 25.195763, -101.484603: : 9/4/2025: David Mercado-Morales: 4 Sep 2025 :
Occurrence Remarks: Eran 3 individuos adultos juntos; Coordinate Uncertainty in Meters: 3.00000.

Ocampo, Chihuahua: 28.313118, -108.216947: : 3/31/2017: Alejandro_Linares: 31 Mar 2017 ; Coordinate Uncertainty in Meters: 8.00000.

Ocampo, Chihuahua: 28.293642, -108.248304: : 10/19/2015: Alejandro_Linares: 19 Oct 2015 ; Coordinate Uncertainty in Meters: 4.00000.

Temosachic, Chihuahua: 28.511397, -108.19135: : 5/12/2000: Oscar Mart├¡nez Galvan: 12 May 2000 ; Coordinate Uncertainty in Meters: 244.00000.

Janos, Chihuahua: 30.725936, -108.840127: : 8/28/2020: Jesus Vadillo: 28 Aug 2020 ; Coordinate Uncertainty in Meters: 4.00000.

Bocoyna, Chihuahua: 27.71775, -107.48515: : 8/20/2020: Juan Carlos: 20 Aug 2020 ; Coordinate Uncertainty in Meters: 1395.00000.

Madera, Chihuahua: 29.204375, -108.204084: : 7/23/2020: Javier Cruz Nieto: 23 Jul 2020 ; Coordinate Uncertainty in Meters: 5.00000.

Chihuahua, Chihuahua: 29.083776, -106.486359: : 8/8/1986: David G. Barker: 8 Aug 1986 ; Coordinate Uncertainty in Meters: 3717.00000.

Namiquipa, Chihuahua: 29.487149, -106.796696: : 7/14/1977: David G. Barker: 14 Jul 1977 ; Coordinate Uncertainty in Meters: 94.00000.

Guachochi, Chihuahua: 26.867951, -106.965337: : 7/16/1983: David G. Barker: 16 Jul 1983 ; Coordinate Uncertainty in Meters: 314.00000.

San Juan de Guadalupe, Durango: 24.485743, -102.503504: : 4/4/2015: alvaro_aguilar: 4 Apr 2015 ; Coordinate Uncertainty in Meters: 488.00000.

San Juan de Guadalupe, Durango: 24.495065, -102.494874: : 11/24/2015: alvaro_aguilar: 24 Nov 2015 ; Coordinate Uncertainty in Meters: 61.00000.

Namiquipa, Chihuahua: 28.896273, -107.455789: : 3/15/2019: Regina Minjares: 15 Mar 2019 ; Coordinate Uncertainty in Meters: 263.00000.

Cuauhtemoc, Chihuahua: 28.608639, -106.712271: : 8/6/2006: Ruben Alire: 6 Aug 2006 ; Coordinate Uncertainty in Meters: 6517.00000.

Ignacio Zaragoza, Chihuahua: 29.528777, -107.534881: : 11/16/2021: Alejandro Colmenero: 16 Nov 2021 ; Coordinate Uncertainty in Meters: 7151.00000.

Yecora, Sonora: 28.395861, -108.793572: : 9/13/2020: David Madriz-Valdovinos: 13 Sep 2020 ; Coordinate Uncertainty in Meters: 510.00000.

Sahuaripa, Sonora: 28.605141, -108.798453: : 10/9/2017: Eric Centenero Alcal├í: 9 Oct 2017 ; Coordinate Uncertainty in Meters: 5000.00000.

Lerdo, Durango: 25.414427, -103.736937: : 9/20/2020: Larissa Olivares: 20 Sep 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Tlahualilo, Durango: 25.93538, -103.641719: : 3/9/2019: Alonso G.A.: 9 Mar 2019 ; Coordinate Uncertainty in Meters: 10.00000.

Casas Grandes, Chihuahua: 30.259596, -108.274609: : 11/2/2024: El├¡as Ramos: 2 Nov 2024 ; Coordinate Uncertainty in Meters: 61.00000.

Guachochi, Chihuahua: 26.843935, -107.432206: : 8/8/2013: Alonso G.A.: 8 Aug 2013 ; Coordinate Uncertainty in Meters: 15.00000.

Casas Grandes, Chihuahua: 29.928752, -108.601871: : 9/28/2020: Ismael: 28 Sep 2020 ; Coordinate Uncertainty in Meters: 244.00000.

Temosachic, Chihuahua: 28.588851, -108.150216: : 10/1/2020: Javier Cruz Nieto: 1 Oct 2020 ; Coordinate Uncertainty in Meters: 46.00000.

Dr. Belisario Dominguez, Chihuahua: 28.028666, -106.536666: : 10/1/2020: Sergio G. Arana: 1 Oct 2020 ; Coordinate Uncertainty in Meters: 2104.00000.

Guadalupe y Calvo, Chihuahua: 26.045271, -106.502787: : 9/9/2014: jolaguez: 9 Sep 2014 ; Coordinate Uncertainty in Meters: 0.11000.

Santiago Papasquiaro, Durango: 25.003542, -105.329519: : 5/29/2017: j_olaguez: 29 May 2017 ; Coordinate Uncertainty in Meters: 2936.00000.

Ocampo, Chihuahua: 28.177035, -108.240051: : 10/30/2014: Mar├¡a Concepci├│n P├⌐rez Recoder: 30 Oct 2014 ; Coordinate Uncertainty in Meters: 7498.00000.

Cuauhtemoc, Chihuahua: 28.60437, -106.678351: : 6/29/2018: Gerardo Ramos-Le├│n: 29 Jun 2018 ; Coordinate Uncertainty in Meters: 300.00000.

Mapimi, Durango: 26.143961, -104.437616: : 9/8/2017: Alejandro Sigala Ch├ívez: 8 Sep 2017 ; Coordinate Uncertainty in Meters: 244.00000.

Madera, Chihuahua: 29.097463, -108.235125: : 9/3/2013: Javier Cruz Nieto: 3 Sep 2013 ; Coordinate Uncertainty in Meters: 8.00000.

Ocampo, Chihuahua: 28.289896, -108.237348: : 9/4/2016: Alejandro_Linares: 4 Sep 2016 ; Coordinate Uncertainty in Meters: 4.00000.

Ocampo, Chihuahua: 28.188953, -108.210257: : 8/9/2012: Oscar Leonardo Chavez Torres: 9 Aug 2012 ; Coordinate Uncertainty in Meters: 15.00000.

Namiquipa, Chihuahua: 29.499364, -106.619132: : 8/7/2019: brandon_dietrich: 7 Aug 2019 ; Coordinate Uncertainty in Meters: 29483.00000.

Janos, Chihuahua: 30.517168, -108.609578: : 6/16/2015: Ricardo Rivera: 16 Jun 2015 ; Coordinate Uncertainty in Meters: 61.00000.

Guanacevi, Durango: 25.930337, -106.359535: : 6/24/2022: Cutberto Valencia Barraza: 24 Jun 2022 ; Coordinate Uncertainty in Meters: 137.00000.

Otaez, Durango: 24.865559, -105.967995: : 7/1/2022: Richard S├ínchez: 1 Jul 2022 ; Coordinate Uncertainty in Meters: 5.00000.

Otaez, Durango: 24.865682, -105.968105: : 7/1/2022: Richard S├ínchez: 1 Jul 2022 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Vista en ejido El Alamito, Stgo. Papasquiaro, Dgo.; Coordinate Uncertainty in Meters: 4.00000.

Chihuahua, Chihuahua: 28.771506, -106.457805: : 8/3/2022: Leobardo Samuel Ruvalcaba G├│mez: 3 Aug 2022 :
Occurrence Remarks: Cascabel encontrada en el camino al Parque Nacional Cumbres de Majalca.; Coordinate Uncertainty in Meters: 237.00000.

Urique, Chihuahua: 27.585637, -107.814376: : 9/28/2014: Eric Centenero Alcal├í: 28 Sep 2014 ; Coordinate Uncertainty in Meters: 5000.00000.

Guanacevi, Durango: 25.918836, -105.963484: : 4/4/2016: Eric Centenero Alcal├í: 4 Apr 2016 ; Coordinate Uncertainty in Meters: 5000.00000.

Unknown, Chihuahua: 28.16468, -108.206497: : 7/7/2026: Jos├⌐ Candelario Hern├índez Alvarez: 7 Jul 2026

San Francisco del Oro, Chihuahua: 26.856412, -106.152263: : 7/3/2014: Juan Carlos P├⌐rez Maga├▒a: 3 Jul 2014 ; Coordinate Uncertainty in Meters: 237.00000.

Satevo, Chihuahua: 27.952788, -106.110497: : 4/3/2021: Bryan Alexis Leyva Espinoza: 3 Apr 2021 ; Coordinate Uncertainty in Meters: 1916.00000.

Guazapares, Chihuahua: 27.345675, -108.329766: : 9/10/2020: Alejandro Colmenero: 10 Sep 2020 ; Coordinate Uncertainty in Meters: 1425.00000.

Guazapares, Chihuahua: 27.367645, -108.319576: : 10/28/2022: Alejandro Colmenero: 28 Oct 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Coronado, Chihuahua: 26.713484, -105.051809: : 9/19/2019: Alejandro Colmenero: 19 Sep 2019 ; Coordinate Uncertainty in Meters: 2508.00000.

Namiquipa, Chihuahua: 29.52503, -106.720338: : 9/22/2016: Diego Abel Rivera: 22 Sep 2016 ; Coordinate Uncertainty in Meters: 88056.00000.

Casas Grandes, Chihuahua: 29.94928, -107.994538: : 6/11/2014: Lobo Viejo: 11 Jun 2014 ; Coordinate Uncertainty in Meters: 122.00000.

Rosario, Chihuahua: 27.296686, -106.437587: : 8/15/2024: David Valles: 15 Aug 2024 ; Coordinate Uncertainty in Meters: 33.00000.

Satevo, Chihuahua: 27.952788, -106.110497: : 5/15/2021: Bryan Alexis Leyva Espinoza: 15 May 2021 ; Coordinate Uncertainty in Meters: 1916.00000.

Temosachic, Chihuahua: 28.646053, -107.89371: : 10/4/2024: El├¡as Ramos: 4 Oct 2024 ; Coordinate Uncertainty in Meters: 7813.00000.

Madera, Chihuahua: 29.394857, -108.380637: : 6/28/2018: Juan Diego Carrillo Contreras: 28 Jun 2018 :
Occurrence Remarks: Individuo tomando el sol.; Coordinate Uncertainty in Meters: 29508.00000.

Santiago Papasquiaro, Durango: 24.874167, -105.998056: : 7/27/2022: Francisco Ortiz Navarro: 27 Jul 2022 :
Occurrence Remarks: V├¡bora encontrada reptando en la Mesa de los Caballos; completamente extendida med├¡a al menos 1.80 m.; Coordinate Uncertainty in Meters: 5.00000.

Occurrence Remarks: Sobre camino, temporada de lluvia; Coordinate Uncertainty in Meters: 108.00000.

San Francisco del Oro, Chihuahua: 26.955585, -105.910449: : 7/23/2022: Luis Gonzalo Mata Hernandez: 23 Jul 2022 ; Coordinate Uncertainty in Meters: 29798.00000.

Nonoava, Chihuahua: 27.436567, -106.810112: : 10/22/2014: Juan Carlos P├⌐rez Maga├▒a: 22 Oct 2014 ; Coordinate Uncertainty in Meters: 1887.00000.

Balleza, Chihuahua: 26.848448, -106.157842: : 7/3/2014: Juan Carlos P├⌐rez Maga├▒a: 3 Jul 2014 ; Coordinate Uncertainty in Meters: 237.00000.

Cananea, Sonora: 30.989765, -110.289179: : 8/28/2025: Diego Cebrero: 28 Aug 2025 ; Coordinate Uncertainty in Meters: 4373.00000.

Chihuahua, Chihuahua: 28.620564, -106.034445: : 9/8/2025: Coral Mireles: 8 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Santiago, Nuevo Leon: 25.367148, -100.306953: : 4/1/2024: lljzl: 1 Apr 2024 ; Coordinate Uncertainty in Meters: 975.00000.

Viesca, Coahuila: 25.557581, -103.060735: : 5/18/2019: Claudio Cant├║ Mu├▒iz: 18 May 2019 ; Coordinate Uncertainty in Meters: 659.00000.

Unknown, Durango: 24.864322, -104.567704: : 7/14/2026: Alejandro_Linares: 14 Jul 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Unknown, Coahuila: 25.400233, -100.573953: : 7/17/2026: jack4rogers: 17 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Hermosillo, Sonora: 29.143582, -110.941107: : 6/26/2025: Jose Romero: 26 Jun 2025 ; Coordinate Uncertainty in Meters: 1184.00000.

San Miguel de Horcasitas, Sonora: 29.575572, -110.820513: : 9/17/2024: Brenda Itzel Salazar Uribe: 17 Sep 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Naco, Sonora: 31.261481, -110.019103: : 7/9/2010: Carlos Gonzalez: 9 Jul 2010 ; Coordinate Uncertainty in Meters: 3330.00000.

Unknown, Coahuila: 25.383486, -100.882005: : 7/22/2026: Gilberto Carranza: 22 Jul 2026 ; Coordinate Uncertainty in Meters: 29981.00000.

Canelas, Durango: 25.161941, -106.466059: : 4/14/2023: Jessica M. Rupit: 14 Apr 2023 ; Coordinate Uncertainty in Meters: 72258.00000.

Nuevo Casas Grandes, Chihuahua: 30.596601, -107.688269: : 8/11/2014: mariookami: 11 Aug 2014 ; Coordinate Uncertainty in Meters: 15.00000.

Canelas, Durango: 25.09949, -106.276364: : 7/24/2020: Alonso G.A.: 24 Jul 2020 ; Coordinate Uncertainty in Meters: 25.00000.

Ocampo, Chihuahua: 28.16849, -108.20678: : 9/4/2018: Mar├¡a Concepci├│n P├⌐rez Recoder: 4 Sep 2018 ; Coordinate Uncertainty in Meters: 117.00000.

Nazas, Durango: 25.229479, -104.031601: : 10/3/2017: ManuelRdz: 3 Oct 2017 ; Coordinate Uncertainty in Meters: 244.00000.

Guazapares, Chihuahua: 27.363041, -108.338559: : 5/23/2023: Alejandro Colmenero: 23 May 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Encontrada junto al poblado el tazcate; Coordinate Uncertainty in Meters: 4.00000.

Namiquipa, Chihuahua: 28.787222, -107.456944: : 7/20/2018: Rayenary Gonzalez Aguilar: 20 Jul 2018 ; Coordinate Uncertainty in Meters: 0.11000.

Guerrero, Chihuahua: 28.508298, -107.610302: : 8/17/2017: Rayenary Gonzalez Aguilar: 17 Aug 2017 ; Coordinate Uncertainty in Meters: 17469.00000.

Janos, Chihuahua: 30.363249, -108.582993: : 7/7/2020: okanipg: 7 Jul 2020 ; Coordinate Uncertainty in Meters: 31.00000.

Casas Grandes, Chihuahua: 30.222258, -108.303236: : 5/23/2024: El├¡as Ramos: 23 May 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Namiquipa, Chihuahua: 28.792103, -107.450153: : 6/9/2016: raulsolish: 9 Jun 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Guaymas, Sonora: 27.894048, -110.950308: : 9/20/2019: Alfonso V. S├ínchez: 20 Sep 2019 ; Coordinate Uncertainty in Meters: 462.00000.

San Miguel de Horcasitas, Sonora: 29.504803, -110.636561: : 5/14/2022: F. Gual-Suarez: 14 May 2022 ; Coordinate Uncertainty in Meters: 18575.00000.

Caborca, Sonora: 30.237383, -112.310356: : 6/24/2022: jorgeortizv: 24 Jun 2022 ; Coordinate Uncertainty in Meters: 33.00000.

GBIFID: 3889039132;; Coordinate Uncertainty in Meters: 450.00000.

GBIFID: 3881843524;; Coordinate Uncertainty in Meters: 19959.00000.

GBIFID: 3784693147;; Coordinate Uncertainty in Meters: 1185.00000.

Occurrence Remarks: Occurrence Remarks: Lifer! Ive really wanted to see these dudes on my trip down here to AZ. I ended up spotting him because a rock fell down the hill near him and he started rattling so I saw him.; Coordinate Uncertainty in Meters: 29173.00000.

Occurrence Remarks: Occurrence Remarks: Second one in a few days seen out on 80, in the flats, where I have never seen them before, and where there dont sem to be any previous records. I wonder whether the drought has anything to do with it...; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Occurrence Remarks: Carr Canyon Rd.; Coordinate Uncertainty in Meters: 8.00000.

Occurrence Remarks: Occurrence Remarks: Hit intentionally by car in front of us, humanely euthanized; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Occurrence Remarks: DOR; Coordinate Uncertainty in Meters: 5.00000.

Santa Cruz, Arizona: 31.675022, -110.932772: : 10/4/2025: Tyler B: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, Arizona: 31.706413, -110.876488: : 8/31/2025: Melanie J. Davis: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Pima, Arizona: 31.763924, -110.84606: : 9/6/2025: Alex Zepeda Gonzalez: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Puerto Penasco, Sonora: 31.647575, -113.480728: : 9/19/2022: F. Gual-Suarez: 19 Sep 2022 ; Coordinate Uncertainty in Meters: 22.00000.

Puerto Penasco, Sonora: 31.647442, -113.480958: : 9/18/2022: F. Gual-Suarez: 18 Sep 2022 ; Coordinate Uncertainty in Meters: 14.00000.

Puerto Penasco, Sonora: 31.647563, -113.48082: : 9/18/2022: F. Gual-Suarez: 18 Sep 2022 ; Coordinate Uncertainty in Meters: 10.00000.

Nogales, Arizona: 31.318704, -111.0463: : 8/5/2018: Jayd Raines: 5 Aug 2018 ; Coordinate Uncertainty in Meters: 29252.00000.

Agua Prieta, Sonora: 31.282579, -108.961345: : 7/27/2023: Andr├⌐s Verver: 27 Jul 2023 ; Coordinate Uncertainty in Meters: 3390.00000.

Occurrence Remarks: Neonate; Coordinate Uncertainty in Meters: 29252.00000.

Nogales, Arizona: 31.315516, -111.127043: : 8/29/2023: Max Roberts: 29 Aug 2023 ; Coordinate Uncertainty in Meters: 29252.00000.

Agua Prieta, Sonora: 31.308619, -108.989617: : 7/27/2023: gretel_carrazco: 27 Jul 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 31.3234, -111.033272: : 7/24/2026: Max Roberts: 24 Jul 2026 ; Coordinate Uncertainty in Meters: 29252.00000.

Nogales, Arizona: 31.289967, -111.077278: : 8/16/2022: Jenna March: 16 Aug 2022 ; Coordinate Uncertainty in Meters: 29252.00000.

Unknown, Arizona: 31.878289, -109.176843: : 7/18/2026: nichole.palacio: 18 Jul 2026 ; Coordinate Uncertainty in Meters: 50.00000.

Unknown, Arizona: 31.429128, -111.17582: : 7/25/2026: Hannah Ivester: 25 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Arizona: 31.533981, -110.747961: : 7/27/2026: pfaucher: 27 Jul 2026 ; Coordinate Uncertainty in Meters: 45.00000.

Nogales, Arizona: 31.281928, -111.131826: : 8/9/2016: spencer_riffle: 9 Aug 2016 ; Coordinate Uncertainty in Meters: 29252.00000.

Agua Prieta, Sonora: 31.308645, -108.989822: : 7/27/2023: Anays Blanco: 27 Jul 2023 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: 79F, found by others; Coordinate Uncertainty in Meters: 29252.00000.

Nogales, Arizona: 31.311846, -111.075323: : 8/10/2023: RJ Baltierra: 10 Aug 2023 ; Coordinate Uncertainty in Meters: 29252.00000.

Occurrence Remarks: Large C. molussus observed on Oversite Canyon Trail. My wife was walking ahead of me on the trail and saw the snake coiled on the trail ahead of her. Temperature was 80┬░F in dappled light of forest. The snake began to move towards the creek while I photographed. It found a nice crevice to coil up in, so I took a couple more photos and we let it be.; Coordinate Uncertainty in Meters: 29252.00000.

Santa Cruz, Arizona: 31.315386, -110.381677: : 8/24/2012: colanegra: 24 Aug 2012 ; Coordinate Uncertainty in Meters: 29252.00000.

Occurrence Remarks: in situ and undisturbed; Coordinate Uncertainty in Meters: 160.00000.

Agua Prieta, Sonora: 31.293404, -108.7816: : 8/15/1986: David G. Barker: 15 Aug 1986 ; Coordinate Uncertainty in Meters: 213.00000.

Nogales, Sonora: 31.306186, -110.935137: : 7/19/2020: Rene Max San Miguel Tovar: 19 Jul 2020 ; Coordinate Uncertainty in Meters: 33551.00000.

Cochise, Arizona: 31.365612, -110.3173: : 9/9/2025: Cameron Eckert: 9 Sep 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Santa Cruz, Arizona: 31.39206, -111.129986: : 9/9/2025: Yinan Li: 9 Sep 2025 ; Coordinate Uncertainty in Meters: 327.00000.

Occurrence Remarks: Small adult, originally found in a rock crevice (photo 7).; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Young / juvenile snake.; Coordinate Uncertainty in Meters: 29226.00000.

Naco, Arizona: 31.315326, -110.224872: : 8/11/2021: bobzappalorti: 11 Aug 2021 ; Coordinate Uncertainty in Meters: 29252.00000.

GBIFID: 1901082910; Occurrence Remarks: Ground temp 71.6 F, air 71.3, 56.1 rh;; Coordinate Uncertainty in Meters: 29252.00000.

Pima, Arizona: 31.529524, -111.252656: : 11/17/2025: Bill Lisowsky: 17 Nov 2025 ; Coordinate Uncertainty in Meters: 908.00000.

GBIFID: 1143520484; Occurrence Remarks: First rattlesnake Ive seen in the canyon!;; Coordinate Uncertainty in Meters: 14542.00000.

Occurrence Remarks: Carcass found at 9:27 on road. Probable road kill. Rattles separated from body. Black on tail obvious. Snake a green color. Revisited at 16:07 and flushed a Turkey Vulture off the remains.; Coordinate Uncertainty in Meters: 2.00000.

Santa Cruz, Arizona: 31.708467, -110.87593: : 9/1/2025: ojalaquellueva: 1 Sep 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Unknown, Arizona: 31.351217, -110.281058: : 5/20/2026: Dalia Gonzalez: 20 May 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Arizona: 31.379305, -110.362397: : 5/22/2026: Dalia Gonzalez: 22 May 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Arizona: 31.809594, -110.396757: : 7/1/2026: Charlie Fox-Whelpton: 1 Jul 2026 ; Coordinate Uncertainty in Meters: 27.00000.

Unknown, Arizona: 31.815062, -110.39748: : 7/1/2026: Charlie Fox-Whelpton: 1 Jul 2026 ; Coordinate Uncertainty in Meters: 23.00000.

Unknown, Arizona: 31.811666, -109.372429: : 9/5/2025: Tellur Fenner (Blue Wind School of Botanical Studies): 5 Sep 2025 ; Coordinate Uncertainty in Meters: 29173.00000.

Unknown, Arizona: 31.882345, -109.20655: : 8/7/2025: jake-dinsmore: 7 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Arizona: 31.390138, -111.119986: : 7/30/2025: jake-dinsmore: 30 Jul 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Cochise, Arizona: 31.756648, -109.225346: : 8/26/2024: e_n_foundathing: 26 Aug 2024 ; Coordinate Uncertainty in Meters: 29199.00000.

Cochise, Arizona: 31.864246, -109.360318: : 9/7/2025: Sean Hartnett: 7 Sep 2025 ; Coordinate Uncertainty in Meters: 29173.00000.

Unknown, Arizona: 31.688591, -111.259423: : 12/2/2025: Daniel: 2 Dec 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Arizona: 31.379163, -110.686813: : 11/15/2025: hoinstar: 15 Nov 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Arizona: 31.877203, -109.251803: : 4/18/2026: Thomas Everest: 18 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Cochise, Arizona: 31.871733, -109.186578: : 4/26/2025: Kevin McKown: 26 Apr 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Cochise, New Mexico: 31.442397, -109.16045: : 9/14/2025: Jorden Perrett: 14 Sep 2025 ; Coordinate Uncertainty in Meters: 29226.00000.

Santa Cruz, Arizona: 31.725088, -110.880087: : 9/14/2025: Allison Shock: 14 Sep 2025 ; Coordinate Uncertainty in Meters: 196.00000.

Unknown, Arizona: 31.825338, -111.51558: : 3/29/2026: SierraTortuga: 29 Mar 2026 ; Coordinate Uncertainty in Meters: 7.00000.

Unknown, Arizona: 31.6715, -110.916633: : 3/29/2026: notfacinated: 29 Mar 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Puerto Penasco, Sonora: 31.647463, -113.478112: : 7/25/2025: F. Gual-Suarez: 25 Jul 2025 ; Coordinate Uncertainty in Meters: 1231.00000.

Puerto Penasco, Sonora: 31.647578, -113.480637: : 7/30/2025: F. Gual-Suarez: 30 Jul 2025 ; Coordinate Uncertainty in Meters: 279.00000.

Cochise, Arizona: 31.395172, -110.244877: : 7/28/2025: Tyler B: 28 Jul 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Pima, Arizona: 31.799295, -110.796928: : 6/7/2025: Debra Miyamoto: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Sonora: 31.283558, -108.98033: : 6/2/2026: Miguel Francisco Enriquez Galaz: 2 Jun 2026 ; Coordinate Uncertainty in Meters: 12.00000.

Unknown, Arizona: 31.420208, -110.473015: : 6/10/2026: Mark Otnes: 10 Jun 2026 ; Coordinate Uncertainty in Meters: 31.00000.

Cochise, Arizona: 31.378808, -110.274429: : 10/8/2025: Loren Tomasi: 8 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 31.529928, -110.773339: : 6/15/2026: pfaucher: 15 Jun 2026 ; Coordinate Uncertainty in Meters: 10.00000.

Unknown, Arizona: 31.441275, -110.315869: : 6/14/2026: gregongie: 14 Jun 2026 ; Coordinate Uncertainty in Meters: 1172.00000.

Unknown, Arizona: 31.71462, -110.87579: : 7/14/2026: jmbearce: 14 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Arizona: 31.713848, -110.874615: : 7/14/2026: jmbearce: 14 Jul 2026 ; Coordinate Uncertainty in Meters: 61.00000.

Occurrence Remarks: Appleton-Whittell Research Ranch of The National Audubon Society, Elgin, Santa Cruz County, AZ, USA For questions or access to this property see https://researchranch.audubon.org/; Coordinate Uncertainty in Meters: 29226.00000.

Unknown, Arizona: 31.780205, -110.476045: : 7/14/2026: k_corbett: 14 Jul 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Cochise, Arizona: 31.838206, -110.352275: : 9/30/2025: macachelsea: 30 Sep 2025 ; Coordinate Uncertainty in Meters: 158.00000.

Cochise, Arizona: 31.810199, -110.395615: : 10/5/2025: Sky Jacobs: 5 Oct 2025 ; Coordinate Uncertainty in Meters: 13.00000.

Santa Cruz, Arizona: 31.690954, -110.993013: : 8/5/2024: cbernz: 5 Aug 2024 ; Coordinate Uncertainty in Meters: 7316.00000.

GBIFID: 3416037331; Occurrence Remarks: This snake crawled up onto the rock my legs were on without me seeing it until its head was at my feet and its body was 3 inches from my knee. Scary.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3466086171; Occurrence Remarks: two in the latter photos;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 3466193039; Occurrence Remarks: Northern Black-tailed Rattlesnake Crotalus molossus ssp. molossus|Northern Black-tailed Rattlesnake (Crotalus molossus molossus);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3764186971; Occurrence Remarks: Western Black-tailed Rattlesnake (Crotalus molossus), Santa Cruz County, Arizona;; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 3773196297; Occurrence Remarks: Western Black-tailed Rattlesnake (Crotalus molossus), Cochise County, Arizona;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 891095767; Occurrence Remarks: Dead snake near the junction of FR 4099 and Mt. Hopkins Road. Me and Peggy and Jon Mann;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 3873228006; Occurrence Remarks: Guindani Canyon. Whetstone Mountains. Coronado National Forest.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 1088913776; Occurrence Remarks: Rattle snake resting in shade under house decking.;; Coordinate Uncertainty in Meters: 1850.00000.

GBIFID: 3881732918; Occurrence Remarks: 112_8628.JPG;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 891099378; Occurrence Remarks: On a birding trip at Fort Huachuca, AZ in August, 1984 I caught a Black-tailed Rattlesnake. It was released after some photos.;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 3888795729; Occurrence Remarks: 112_8880-Edit.tif;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3902384253; Occurrence Remarks: Dying;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 3903201395; Occurrence Remarks: This snake wasnÆt too happy that we drove past as it was crossing the road;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3903009858; Occurrence Remarks: Guindani Canyon. Whetstone Mountains. Coronado National Forest.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 3903664414; Occurrence Remarks: IMG_4463.jpg Sadly this snake was roadkill.;; Coordinate Uncertainty in Meters: 127.00000.

GBIFID: 3903579783; Occurrence Remarks: On the crawl.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3912151704; Occurrence Remarks: Cochise County, Arizona;; Coordinate Uncertainty in Meters: 107956.00000.

GBIFID: 3923276967; Occurrence Remarks: near Whitmire Canyon Wilderness Study Area, Hidalgo County, NM;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3963668840; Occurrence Remarks: For questions or access to this property see ;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4039556462; Occurrence Remarks: Maybe? I was told by a guide this was a rattlesnake but didnÆt get close enough to see anything else lol;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4102588157; Occurrence Remarks: For questions or access to this property see ;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3090767423; Occurrence Remarks: Blacktailed rattlesnake Ruby AZ 28 may 2010 db;; Coordinate Uncertainty in Meters: 100.00000.

GBIFID: 4129685182; Occurrence Remarks: This adult snake had a dislocated jaw, but was behaving normally.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4153927291; Occurrence Remarks: Coronado National Forest;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4171204291; Occurrence Remarks: his tail is undoubtedly black. 10/10. Lives up to the expectation itÆs name demands. Not an impostor. Spotted by @thewrangler1999 (insta) 83░;; Coordinate Uncertainty in Meters: 23.00000.

GBIFID: 4171630586; Occurrence Remarks: he was chasing me trying to ask me about our lord and savior so pardon the blurry photos. couldnÆt get away from him fast enough he almost got me Cruised by @thewrangler1999 81░;; Coordinate Uncertainty in Meters: 277.00000.

GBIFID: 4171296226; Occurrence Remarks: LOST CHILD. In search of mother. Child abandonment is a crime. Cruised at 80░;; Coordinate Uncertainty in Meters: 149.00000.

GBIFID: 4171506410; Occurrence Remarks: alexa play ôblack and yellowö by wiz khalifah cruised at 85░ with @reptijake;; Coordinate Uncertainty in Meters: 124.00000.

GBIFID: 4172061179; Occurrence Remarks: cruised at 78░ Looks like he swallowed a highlighter dear lord he is bright;; Coordinate Uncertainty in Meters: 302.00000.

GBIFID: 4171164216; Occurrence Remarks: 80░ @reptijake cruised this big boi;; Coordinate Uncertainty in Meters: 218.00000.

GBIFID: 4400236440; Occurrence Remarks: Guindani Canyon. Whetstone Mountains. Coronado National Forest.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 4400352844; Occurrence Remarks: 70F;; Coordinate Uncertainty in Meters: 29252.00000.

GBIFID: 4399864000; Occurrence Remarks: 68F;; Coordinate Uncertainty in Meters: 29252.00000.

GBIFID: 4405375239; Occurrence Remarks: Prettiest rattlesnake of the trip, and I really wish Id managed some nice photos, but I was focused on keeping my bird tour from getting bitten, plus this guy turned tail and headed back into cover as soon as we all walked up;; Coordinate Uncertainty in Meters: 500.00000.

GBIFID: 4413399774; Occurrence Remarks: Some guy in a small car was driving up and down the road, killing them all. He even parked and tried to open my truck door - thankfully, it was locked.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4414144507; Occurrence Remarks: My first black tail and it was a really nice one! Found crawling onto the road just before sunset. Was relatively defensive for a black-tail and it started rattling almost immediately.;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 4413940907; Occurrence Remarks: was crawling along the side of the road when I found it;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 4414003691; Occurrence Remarks: One of the most beautiful rattlesnakes I have ever seen!;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4424458613; Occurrence Remarks: extremely spicy;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1453063023; Occurrence Remarks: Crossing Flux Canyon Road;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4458346348; Occurrence Remarks: Chiricahua Mountains, AZ;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 4430688632; Occurrence Remarks: Turkey Creek area if Chiricahua Mountains;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1143523796; Occurrence Remarks: Very green color and wasnt in a hurry to cross the street.;; Coordinate Uncertainty in Meters: 197.00000.

GBIFID: 4438674186; Occurrence Remarks: check id;; Coordinate Uncertainty in Meters: 666.00000.

GBIFID: 1986532387; Occurrence Remarks: Scanned from slide... Month and year accurate - date is approximate.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1986532609; Occurrence Remarks: Scanned from slide... Month and year accurate - date is approximate.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1986538347; Occurrence Remarks: Scanned from slide... Month and year accurate - date is approximate.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4855382689; Occurrence Remarks: Black-tailed Rattlesnake (Crotalus molossus); Mt. Hopkins Road FSR 184, Coronado NF, W of Arivaca Junction, AZ;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4901669992; Occurrence Remarks: Dead;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4901191362; Occurrence Remarks: Dead;; Coordinate Uncertainty in Meters: 26.00000.

GBIFID: 4908950656; Occurrence Remarks: Garden Canyon near lower locked gate to road, Ft Huachuca.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4919521364; Occurrence Remarks: Not sure exactly where we were on the trail. Those who saw it first said it was stretched out but then it curled up before I got there. Was right off the trail under a tree. Very mellow; no rattling or tongue movements. Most beautiful rattlesnake Ive ever seen!;; Coordinate Uncertainty in Meters: 49.00000.

GBIFID: 4921661221; Occurrence Remarks: Snake was dead;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4922037459; Occurrence Remarks: 76F;; Coordinate Uncertainty in Meters: 29252.00000.

GBIFID: 4936000621; Occurrence Remarks: almost stepped on it :(;; Coordinate Uncertainty in Meters: 173.00000.

GBIFID: 4935972110; Occurrence Remarks: Predated or, more likely, killed by hiker;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4935779855; Occurrence Remarks: Climbed a thorny bush as it crawled off the road;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4937112697; Occurrence Remarks: DOR;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 4936221712; Occurrence Remarks: Loc. approximate;; Coordinate Uncertainty in Meters: 61.00000.

GBIFID: 4936240763; Occurrence Remarks: Initially heard rattling about 2 meters off trail in Sycamore Canyon. We observed the snake as it moved away from the trail into dense vegetation, rattling the entire time. This was the first C. molossus Ive ever seen and the first of three on this day.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4937066791; Occurrence Remarks: Spotted coiled on a rock ledge adjacent to the trail in Sycamore Canyon. Snake did not move while being observed and photographed by a group of people.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4936230891; Occurrence Remarks: Observed crossing Ruby Road shortly before sunset. Snake crossed the road in defensive posture without rattling.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4945904324; Occurrence Remarks: IMG_0532.HEICp18 Sadly, found dead in the road.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4945564344; Occurrence Remarks: The snake was found 11:50 PM on 9/1/24. Photos taken the following morning and the snake was released where found.;; Coordinate Uncertainty in Meters: 196.00000.

GBIFID: 4945965079; Occurrence Remarks: Found the night before (9/3/24) at approximately 11 PM. Photographed the next morning and released a short distance from the road on which it was found/rescued.;; Coordinate Uncertainty in Meters: 36745.00000.

GBIFID: 4949924997; Occurrence Remarks: Sorry for the roadkill imagery :(;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4953136158; Occurrence Remarks: Beautiful black tail observed slowly crossing the road on a cool night just over two hours after sunset. Very calm snake that didnt rattle or behave defensively as I photographed it. I walked back to camp to get my DSLR and snake hook to move it off the road and when I got back it was already gone.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4952873611; Occurrence Remarks: Large black tail observed on edge of forest road in Rucker Canyon about two hours after sunset.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4952718238; Occurrence Remarks: Observed in ditch along the side of the road. I was done looking for herps for the night and was walking back to camp when I heard rattling coming from the side of the road. I shined the area with my flashlight and saw this black tail. I took a couple photos and left it alone. I would have never known it was there had it not rattled...;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4954434359; Occurrence Remarks: had rock squirrel meal;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4978583009; Occurrence Remarks: courting pair found together;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 5006996527; Occurrence Remarks: When in SE Arizona, we often drive the Hereford Road and chase critters off of the road.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 2898246329; Occurrence Remarks: For questions or access to this property see https://researchranch.audubon.org/;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2273280625; Occurrence Remarks: Animas Mountains, W of Animas Peak, Hidalgo Co., NM. Snake photod in situ in burned pine-oak woodland below a talus slope. 29 Sep 1990. Digital photo taken of my print photo.;; Coordinate Uncertainty in Meters: 488.00000.

GBIFID: 2294569730; Occurrence Remarks: Stepped within inches of this guy!;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 5230239559; Occurrence Remarks: Roadkilled;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 2898493344; Occurrence Remarks: For questions or access to this property see https://researchranch.audubon.org/;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 5230678435; Occurrence Remarks: Sycamore Canyon, Pajarita Wilderness;; Coordinate Uncertainty in Meters: 200.00000.

GBIFID: 2311396638; Occurrence Remarks: Gerald;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2331897898; Occurrence Remarks: About a mile above Lower Copper Canyon transect crossing the road.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2350445480; Occurrence Remarks: I have pictures of the tail and full body, if necessary.;; Coordinate Uncertainty in Meters: 99.00000.

GBIFID: 2350448942; Occurrence Remarks: Collected by a large Corvid early the next morning;; Coordinate Uncertainty in Meters: 63.00000.

GBIFID: 2898387346; Occurrence Remarks: For questions or access to this property see https://researchranch.audubon.org/;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 2429326294; Occurrence Remarks: On trail.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 3090603617; Occurrence Remarks: Crotalus molossus - Black-tailed rattlesnake - 21 sep 2019 Ruby AZ;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2447996448; Occurrence Remarks: Roadkill;; Coordinate Uncertainty in Meters: 229.00000.

GBIFID: 2576325821; Occurrence Remarks: Carr Canyon;; Coordinate Uncertainty in Meters: 546.00000.

GBIFID: 3079513761; Occurrence Remarks: DOR;; Coordinate Uncertainty in Meters: 1876.00000.

GBIFID: 1323029802; Occurrence Remarks: Photo by JGarza;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 1323029884; Occurrence Remarks: Photo by JGarza;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 891761275; Occurrence Remarks: Indian Creek Canyon, Animas Mountains, Hidalgo Co., New Mexico, USA.;; Coordinate Uncertainty in Meters: 1389.00000.

GBIFID: 1453277940; Occurrence Remarks: Almost ran over this beauty, but saw him in time and centered the auto over it. We stopped, came back did some photos and helped it off the road.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2898453380; Occurrence Remarks: picture taken after I relocated it from between my outbuildings. GPS coordinates are for the location where I found him. Relocated approx. 300m to the west. For questions or access to this property see https://researchranch.audubon.org/;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3090850755; Occurrence Remarks: Black-tailed rattlesnake in court house - Ruby AZ 7 apr 2020;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 2814104545; Occurrence Remarks: Digiscoped.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1453495822; Occurrence Remarks: I came across a mated pair of (Western) Black-tailed Rattlesnakes in the bottom of California Gulch on my hike out. The first image shows the two together with one of them just about to leave. The second image is the remaining snake after its mate departed. Scanned at 300 dpi from APS prints.;; Coordinate Uncertainty in Meters: 1000.00000.

GBIFID: 2826293542; Occurrence Remarks: Crossing road.;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 2826486219; Occurrence Remarks: Heard the rattle when I suddenly netted a robber fly perched near the bush this snake had been hidden under, so I backed off. It then slid across to the rocks (pic 1). An hour later I swung by again and found it waiting expectantly outside a burrow (pic 2). I wish him good hunting, but Im a little worried hes too exposed for his own good-- this was just outside the trailhead parking lot, plus there were tons of cattle grazing the site. Saw another black-tail basking on the road a few miles away on my way out. USA: Arizona: Santa Cruz Co., Santa Rita Mtns, Temporal Canyon trailhead, ~7 mi NW of Patagonia. TAM_1468 (specimen not collected).;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 4936293092; Occurrence Remarks: Rucker Canyon;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 2868185822; Occurrence Remarks: I should note that we found this on the road already dead from being run over. I would love to have gotten a picture of it before it was in this condition.;; Coordinate Uncertainty in Meters: 1177.00000.

GBIFID: 4936894894; Occurrence Remarks: Portal AZ;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 2992874645; Occurrence Remarks: BLACK-TAILED RATTLESNAKE Crotalus molossus;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2992660036; Occurrence Remarks: In garage;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 3031726927; Occurrence Remarks: DCF 1.0;; Coordinate Uncertainty in Meters: 4291.00000.

GBIFID: 4935987923; Occurrence Remarks: Large adult observed DOR (+24 hrs) w Bernd Skubowius and Jeff Wilson. Imaged only. GTS 2915.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4936635007; Occurrence Remarks: DOR adult male. With Bernd Skubowius. Rattle had been removed. Imaged only. GTS 2932.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4937077581; Occurrence Remarks: DOR young adult. With Bernd Skubowius. Imaged only. GTS 2933.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 1586127138; Occurrence Remarks: DOR.;; Coordinate Uncertainty in Meters: 112.00000.

GBIFID: 1586131631; Occurrence Remarks: Cruised on road.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3090867287; Occurrence Remarks: removed from a tool shed. Notes on dates lost but was in July.;; Coordinate Uncertainty in Meters: 111.00000.

GBIFID: 1668819898; Occurrence Remarks: Pima County, Arizona, US;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3314465365; Occurrence Remarks: Ramsey Canyon;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1677305923; Occurrence Remarks: The rest of the day and evening we spent around Madera Canyon in the Coronado National Forest. It was a really wonderful location! :) Still working on the IDs for these... Check out the journal entry for lots of better photos of many of these same species: Coordinate Uncertainty in Meters: 14.00000.

GBIFID: 3335220402; Occurrence Remarks: One youngin and one adult;; Coordinate Uncertainty in Meters: 252.00000.

GBIFID: 3335561634; Occurrence Remarks: I wonder if this is the western but the picture on the inature example looks different;; Coordinate Uncertainty in Meters: 25754.00000.

GBIFID: 3337789542; Occurrence Remarks: Barely saw it before it crawled under a large boulder.;; Coordinate Uncertainty in Meters: 450.00000.

GBIFID: 3355192341; Occurrence Remarks: First one of the night, found coiled next to a recently fallen rock on the side of the road;; Coordinate Uncertainty in Meters: 45.00000.

GBIFID: 3355169440; Occurrence Remarks: Quickly left the road, then proceeded to scale this near-vertical rock face. Pretty cool to watch.;; Coordinate Uncertainty in Meters: 58.00000.

Unknown, Arizona: 31.815095, -110.397522: : 7/1/2026: k_corbett: 1 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Dead on road.; Coordinate Uncertainty in Meters: 5.00000.

Cochise, Arizona: 31.424, -110.301483: : 8/19/2025: D. Doyle: 19 Aug 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Santa Cruz, Arizona: 31.50538, -110.676987: : 8/20/2025: kathelma: 20 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Pima, Arizona: 31.733898, -110.881988: : 8/18/2025: Max Roberts: 18 Aug 2025 ; Coordinate Uncertainty in Meters: 15.00000.

Santa Cruz, Arizona: 31.718091, -110.877599: : 8/18/2025: Max Roberts: 18 Aug 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Occurrence Remarks: Huge male, roughly 3.5ft in length.; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: Lifer! Lil juvie, @herphendrie fell out the car widow because he thought it was a baby green rat; Coordinate Uncertainty in Meters: 29226.00000.

Nogales, Arizona: 31.296765, -111.141381: : 8/10/2023: RJ Baltierra: 10 Aug 2023 ; Coordinate Uncertainty in Meters: 29252.00000.

Cochise, Arizona: 31.479747, -110.338242: : 8/25/2025: Vincent Weber: 25 Aug 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Santa Cruz, Arizona: 31.489325, -110.692963: : 8/19/2025: Wolfgang W├╝ster: 19 Aug 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Found with @kid-herper; his lifer! Fell out of the car window for this guys because I thought it was a green rat at first; Coordinate Uncertainty in Meters: 29226.00000.

Cochise, Arizona: 31.837745, -110.35067: : 8/23/2025: Patrick Cicero: 23 Aug 2025 ; Coordinate Uncertainty in Meters: 500.00000.

Occurrence Remarks: Dead on Road.; Coordinate Uncertainty in Meters: 247.00000.

Janos, Chihuahua: 31.293294, -108.781428: : 9/15/1986: David G. Barker: 15 Sep 1986 ; Coordinate Uncertainty in Meters: 155.00000.

Santa Cruz, Arizona: 31.71073, -110.875563: : 8/27/2025: John Seal: 27 Aug 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Hidalgo, New Mexico: 31.51075, -109.03573: : 8/14/2025: William Harmon: 14 Aug 2025 ; Coordinate Uncertainty in Meters: 20.00000.

Pima, Arizona: 31.762987, -110.845925: : 9/6/2025: laloblitz: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Cochise, Arizona: 31.445753, -110.313438: : 9/7/2025: tpwarrior: 7 Sep 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Cochise, Arizona: 31.881872, -109.20707: : 9/7/2025: Wolfgang W├╝ster: 7 Sep 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Cochise, Arizona: 31.883263, -109.204955: : 9/6/2025: Wolfgang W├╝ster: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Santa Cruz, Arizona: 31.390516, -111.072242: : 8/30/2025: timoteo_b: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Santa Cruz, Arizona: 31.387506, -111.065575: : 8/30/2025: timoteo_b: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Santa Cruz, Arizona: 31.610347, -110.837865: : 8/28/2025: Jorge Aguilera: 28 Aug 2025 ; Coordinate Uncertainty in Meters: 29199.00000.

Occurrence Remarks: found dead and dried; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Arizona: 31.343939, -110.281204: : 7/15/2026: Travis Williams: 15 Jul 2026 ; Coordinate Uncertainty in Meters: 130.00000.

Unknown, Arizona: 31.694247, -110.99057: : 7/16/2026: yichen_g: 16 Jul 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Arizona: 31.67737, -110.920303: : 7/16/2026: tbargholz: 16 Jul 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Relocated from the neighbors porch to our property.; Coordinate Uncertainty in Meters: 120.00000.

Occurrence Remarks: DOR in South Fork

Santa Cruz, Arizona: 31.6669, -110.81951: : 8/31/2025: mel letterman: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 29199.00000.

Occurrence Remarks: Crotalus Molossus; Coordinate Uncertainty in Meters: 1375.00000.

Puerto Penasco, Sonora: 31.583605, -113.357895: : 5/8/2022: F. Gual-Suarez: 8 May 2022 ; Coordinate Uncertainty in Meters: 6112.00000.

Nogales, Arizona: 31.287674, -111.124005: : 8/15/2017: Joey Mugleston: 15 Aug 2017 ; Coordinate Uncertainty in Meters: 29252.00000.

GBIFID: 4936464523; Occurrence Remarks: Adult in ambush posture observed and imaged by Rick Tozer.;; Coordinate Uncertainty in Meters: 250.00000.

GBIFID: 3892518149; Occurrence Remarks: Overnight DOR. Nice adult female...;; Coordinate Uncertainty in Meters: 1.11000.

Occurrence Remarks: Occurrence Remarks: Poor focus - sorry!; Coordinate Uncertainty in Meters: 31.00000.

Pima, Arizona: 32.223673, -110.6853: : 10/26/2025: Matt Breed: 26 Oct 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Cochise, Arizona: 32.040255, -109.382943: : 8/22/2025: LittleBlackCat: 22 Aug 2025 ; Coordinate Uncertainty in Meters: 29146.00000.

Pima, Arizona: 32.319162, -110.713905: : 10/22/2025: Courtney Christie: 22 Oct 2025 ; Coordinate Uncertainty in Meters: 29120.00000.

Occurrence Remarks: We were a little surprised to see this rattle snake out this late in the year. Probably getting ready to go down for the winter.; Coordinate Uncertainty in Meters: 69.00000.

Greenlee, Arizona: 33.67587, -109.087211: : 8/22/2025: irvintorres: 22 Aug 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Same individual as @natricineguy and @risky_business; Coordinate Uncertainty in Meters: 29146.00000.

Occurrence Remarks: Young adult gravid female (opaque) observed active in the Tinajas Altas Mountains. Imaged only. GTS 2051. Saw two others as well.; Coordinate Uncertainty in Meters: 29120.00000.

Unknown, Arizona: 33.213017, -109.376738: : 7/24/2026: chesneyc: 24 Jul 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Arizona: 31.92088, -109.251205: : 7/14/2026: blacktip: 14 Jul 2026 ; Coordinate Uncertainty in Meters: 30.00000.

Pima, Arizona: 32.416592, -110.936355: : 9/25/2025: Rick Rendon: 25 Sep 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Arizona: 32.145901, -109.48528: : 7/25/2026: chesneyc: 25 Jul 2026 ; Coordinate Uncertainty in Meters: 17.00000.

Unknown, Arizona: 31.949308, -109.137283: : 7/23/2026: chesneyc: 23 Jul 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Cochise, Arizona: 31.893308, -109.168894: : 6/26/2024: Joe Paysen: 26 Jun 2024 ; Coordinate Uncertainty in Meters: 764.00000.

Hidalgo, New Mexico: 31.958062, -108.69199: : 9/14/2024: stromboli_homie7: 14 Sep 2024 ; Coordinate Uncertainty in Meters: 7028.00000.

Occurrence Remarks: Found with @milkysnake and @natricineguy; Coordinate Uncertainty in Meters: 29146.00000.

La Paz, Arizona: 33.553392, -113.83232: : 9/3/2025: Jorge Aguilera: 3 Sep 2025 ; Coordinate Uncertainty in Meters: 28957.00000.

Catron, New Mexico: 33.256306, -108.874048: : 9/6/2025: Yinan Li: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 28984.00000.

Grant, New Mexico: 33.039981, -108.532997: : 9/9/2025: jakekuschel: 9 Sep 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Grant, New Mexico: 32.943852, -107.824038: : 9/12/2025: Matt Becker: 12 Sep 2025 ; Coordinate Uncertainty in Meters: 29039.00000.

GBIFID: 4034727256; Occurrence Remarks: Photo: Natalia Michailenko;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 4121294349; Occurrence Remarks: I only captured part of this snake, but I was told by several people that saw it before me that it was a rattlesnake. 2023-AZ-9248;; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 32.329412, -110.797675: : 2/22/2026: florescuada11: 22 Feb 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Arizona: 33.271253, -111.02693: : 4/13/2026: Joe Black: 13 Apr 2026 ; Coordinate Uncertainty in Meters: 14.00000.

Unknown, Arizona: 32.878575, -110.395562: : 4/15/2026: Furey Stirrat: 15 Apr 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Arizona: 32.342016, -110.855289: : 4/16/2026: Vikki Jackson: 16 Apr 2026 ; Coordinate Uncertainty in Meters: 195.00000.

Unknown, Arizona: 32.340475, -110.854938: : 4/16/2026: Lyn Jackson: 16 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 33.350636, -112.057907: : 4/21/2026: ash ponders: 21 Apr 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Arizona: 33.334017, -112.121022: : 4/21/2026: pseudalpine: 21 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 32.366126, -110.915857: : 4/6/2026: Annie Savaria-Watson: 6 Apr 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, New Mexico: 33.226768, -108.269148: : 4/26/2026: colinpena: 26 Apr 2026 ; Coordinate Uncertainty in Meters: 39.00000.

Maricopa, Arizona: 33.781817, -111.824031: : 11/4/2025: pseudalpine: 4 Nov 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Pima, Arizona: 32.416474, -110.9348: : 9/26/2025: Jake Senne: 26 Sep 2025 ; Coordinate Uncertainty in Meters: 15.00000.

Cochise, Arizona: 32.078286, -109.393438: : 11/16/2025: pseudomyrmex: 16 Nov 2025 ; Coordinate Uncertainty in Meters: 29146.00000.

Unknown, Arizona: 34.051024, -110.970698: : 5/20/2026: retrocascadia: 20 May 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Unknown, Arizona: 32.5375, -110.712653: : 5/3/2026: jctalkington: 3 May 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: On sugarloaf trail; Coordinate Uncertainty in Meters: 10.00000.

Occurrence Remarks: Relatively thin individual in need of a meal. Was seen crawling along the edge of the road. Had 8 Psychodid flies feeding on it. There was heavy rain the night before.; Coordinate Uncertainty in Meters: 29120.00000.

Cochise, Arizona: 31.956897, -109.203614: : 9/5/2025: Sean Hartnett: 5 Sep 2025 ; Coordinate Uncertainty in Meters: 29173.00000.

Unknown, Arizona: 32.339688, -110.693363: : 8/17/2025: Wade Olsson: 17 Aug 2025 ; Coordinate Uncertainty in Meters: 461.00000.

Unknown, Arizona: 31.935828, -111.531166: : 3/11/2026: Nate Peterson: 11 Mar 2026 ; Coordinate Uncertainty in Meters: 29173.00000.

Unknown, Arizona: 32.249015, -113.401536: : 3/14/2026: Tellur Fenner (Blue Wind School of Botanical Studies): 14 Mar 2026 ; Coordinate Uncertainty in Meters: 29120.00000.

Pima, Arizona: 32.08454, -110.456314: : 9/20/2025: Max Roberts: 20 Sep 2025 ; Coordinate Uncertainty in Meters: 235.00000.

Grant, New Mexico: 32.959272, -108.396799: : 8/23/2025: LittleBlackCat: 23 Aug 2025 ; Coordinate Uncertainty in Meters: 29039.00000.

Pinal, Arizona: 32.607625, -110.746522: : 10/10/2025: Zanna Vargas: 10 Oct 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Pinal, Arizona: 32.6093, -110.733629: : 10/10/2025: Rio Vargas: 10 Oct 2025 ; Coordinate Uncertainty in Meters: 203.00000.

Unknown, New Mexico: 33.045137, -108.532666: : 5/1/2026: jooner: 1 May 2026 ; Coordinate Uncertainty in Meters: 63.00000.

Unknown, Arizona: 32.15251, -109.471058: : 4/30/2026: uscgbruce: 30 Apr 2026 ; Coordinate Uncertainty in Meters: 998.00000.

Unknown, Arizona: 32.916155, -110.50002: : 5/2/2026: Noah Lieberman: 2 May 2026 ; Coordinate Uncertainty in Meters: 6032.00000.

Unknown, Arizona: 32.337272, -110.691697: : 5/3/2026: Dennis Kent: 3 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 32.337247, -110.691733: : 5/3/2026: Greg Hays: 3 May 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: https://youtu.be/ezw2yze4FnI; Coordinate Uncertainty in Meters: 10.00000.

Unknown, Arizona: 32.821767, -111.716378: : 5/3/2026: Carlos A. Armenta: 3 May 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Arizona: 34.319947, -111.456337: : 5/3/2026: gwentomologist: 3 May 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Unknown, Arizona: 32.36132, -110.924405: : 5/5/2026: wallen016: 5 May 2026 ; Coordinate Uncertainty in Meters: 1.11000.

Unknown, Arizona: 32.184258, -109.648138: : 5/9/2026: Lucas Pittman: 9 May 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Arizona: 32.213547, -111.005906: : 3/25/2026: mreilley7: 25 Mar 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Arizona: 32.219512, -111.002681: : 12/11/2025: josephrlee: 11 Dec 2025 ; Coordinate Uncertainty in Meters: 1.00000.

Unknown, Arizona: 32.06747, -110.621505: : 1/15/2026: Dalton Carper: 15 Jan 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Arizona: 32.336391, -110.692674: : 5/3/2026: Rob Van Epps: 3 May 2026 ; Coordinate Uncertainty in Meters: 41.00000.

Unknown, Arizona: 33.8117, -110.852351: : 3/28/2026: jblackwoodmiller: 28 Mar 2026 ; Coordinate Uncertainty in Meters: 5513.00000.

Unknown, Arizona: 31.923261, -109.966841: : 4/13/2026: Bill Lisowsky: 13 Apr 2026 ; Coordinate Uncertainty in Meters: 343.00000.

Pima, Arizona: 32.197954, -110.557909: : 9/10/2025: Matthew Lachiusa: 10 Sep 2025 ; Coordinate Uncertainty in Meters: 29146.00000.

Occurrence Remarks: Along Mesquite Canyon Trail about 1/3 to 1/2 mile uphill from Area 7 parking.; Coordinate Uncertainty in Meters: 4.00000.

Maricopa, Arizona: 33.335063, -112.064261: : 9/20/2025: Laura: 20 Sep 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: DOR; Coordinate Uncertainty in Meters: 224.00000.

Maricopa, Arizona: 33.356919, -112.014867: : 9/15/2025: beoschaeffer: 15 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: with friend, the White-throated Woodrat.; Coordinate Uncertainty in Meters: 1.11000.

Maricopa, Arizona: 33.566339, -111.360472: : 9/14/2025: Jeff Haight: 14 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Painful DOR :(; Coordinate Uncertainty in Meters: 29120.00000.

Unknown, Arizona: 32.326224, -110.802932: : 5/12/2026: Noah Lieberman: 12 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: In ambush at the edge of the road. There was light rain in this area in the afternoon.; Coordinate Uncertainty in Meters: 29120.00000.

Unknown, Arizona: 32.395181, -110.861825: : 5/13/2026: cameron_tescher: 13 May 2026 ; Coordinate Uncertainty in Meters: 29120.00000.

Unknown, Arizona: 33.339737, -112.075218: : 5/2/2026: Rae Hughes: 2 May 2026 ; Coordinate Uncertainty in Meters: 264.00000.

Unknown, Arizona: 32.218159, -111.004873: : 3/22/2026: Gabri Ele: 22 Mar 2026 ; Coordinate Uncertainty in Meters: 623.00000.

Unknown, Arizona: 33.590587, -112.519403: : 3/23/2026: Don Haven: 23 Mar 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 33.344863, -112.04553: : 4/1/2026: Aaron Treher: 1 Apr 2026 ; Coordinate Uncertainty in Meters: 41.00000.

Unknown, Arizona: 32.229217, -110.610503: : 4/2/2026: mhrains: 2 Apr 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: In road after sunset, in Larrea, Neltuma, Fouquieria, Olneya, Carneggia, Stenocereus, Opuntia desert shrubland.; Coordinate Uncertainty in Meters: 29146.00000.

Unknown, Arizona: 33.277528, -111.13475: : 4/3/2026: aachand8: 3 Apr 2026 ; Coordinate Uncertainty in Meters: 3027.00000.

Unknown, Arizona: 33.588706, -111.725465: : 4/7/2026: jeffespo: 7 Apr 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Unknown, New Mexico: 31.930175, -107.066989: : 4/7/2026: Thomas Everest: 7 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 32.222011, -111.063142: : 3/23/2026: Brian Milanek: 23 Mar 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Rattled until I finally walked away; Coordinate Uncertainty in Meters: 1840.00000.

Pima, Arizona: 32.18309, -110.612682: : 3/29/2025: Katt Hendershot: 29 Mar 2025 ; Coordinate Uncertainty in Meters: 26124.00000.

Pima, Arizona: 32.249023, -110.649011: : 5/25/2025: Courtney Christie: 25 May 2025 ; Coordinate Uncertainty in Meters: 29120.00000.

Pima, Arizona: 32.338263, -110.706612: : 7/22/2025: Matt Felperin: 22 Jul 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Catron, New Mexico: 33.285388, -108.269653: : 4/21/2025: Danny Tipton: 21 Apr 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: 4220 ft elevation. Help with ID please.?black tailed; Coordinate Uncertainty in Meters: 5.00000.

Occurrence Remarks: Green rattlesnake spotted by my Stepmother while hiking in Ventana Canyon.; Coordinate Uncertainty in Meters: 14.00000.

Unknown, Arizona: 34.319963, -111.456505: : 6/4/2026: gwentomologist: 4 Jun 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Occurrence Remarks: Found dead on road.

Occurrence Remarks: Low elevation morph, although went sky island so many times but still miss the high yellow morph of this species (;^_^A; Coordinate Uncertainty in Meters: 28846.00000.

Catron, New Mexico: 33.277959, -108.301019: : 9/20/2025: Joshua Hull: 20 Sep 2025 ; Coordinate Uncertainty in Meters: 11870.00000.

Unknown, Arizona: 34.219123, -111.263646: : 4/12/2026: augurapart: 12 Apr 2026 ; Coordinate Uncertainty in Meters: 1461.00000.

Unknown, Arizona: 33.279285, -111.157363: : 6/20/2026: T.L.Knight: 20 Jun 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Unknown, Arizona: 32.008635, -109.372655: : 7/22/2026: kenzingtonscarlet: 22 Jul 2026 ; Coordinate Uncertainty in Meters: 10.00000.

Unknown, Arizona: 32.008573, -109.372989: : 7/23/2026: kenzingtonscarlet: 23 Jul 2026 ; Coordinate Uncertainty in Meters: 56.00000.

Catron, New Mexico: 33.264681, -108.350769: : 9/21/2025: Joshua Hull: 21 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Catron, New Mexico: 33.229004, -108.266204: : 9/25/2025: Barb Sargent: 25 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Pima, Arizona: 32.064785, -112.7129: : 8/17/2025: Nate Peterson: 17 Aug 2025 ; Coordinate Uncertainty in Meters: 61.00000.

GBIFID: 1838050084; Occurrence Remarks: Two individuals mating on the trail.;; Coordinate Uncertainty in Meters: 1002.00000.

GBIFID: 3759265320; Occurrence Remarks: Did not rattle when encountered- did not display aggressive behavior. Retreated into a rock outcrop into the position in photo.;; Coordinate Uncertainty in Meters: 216.00000.

GBIFID: 3759888293; Occurrence Remarks: There be three things which are too wonderful for me, yea, four which I know not: The way of an eagle in the air; the way of a serpent upon a rock; the way of a ship in the midst of the sea; and the way of a man with a maid ~ Proverbs 30:18,29;; Coordinate Uncertainty in Meters: 1622.00000.

GBIFID: 3759942593; Occurrence Remarks: The moth thing was at the Arizona Sonoran Desert Museum on a prior day.;; Coordinate Uncertainty in Meters: 213.00000.

GBIFID: 3759241164; Occurrence Remarks: Black tailed rattlesnake;; Coordinate Uncertainty in Meters: 2471.00000.

GBIFID: 1841203667; Occurrence Remarks: This snake had a greenish coloring and the bands at the rattle end were not distinct....looked dark with slight whitish bands underneath the overall black of the tail end. Photo credit to Kevin Buettner.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 3860125722; Occurrence Remarks: Observed dead in water.;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 3859669833; Occurrence Remarks: fan of the new road;; Coordinate Uncertainty in Meters: 553.00000.

GBIFID: 1847547108; Occurrence Remarks: I think this is a Black-tailed Rattlesnake?;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1847555613; Occurrence Remarks: Ambush posture about 18ö off the ground in a small hole in the granite.;; Coordinate Uncertainty in Meters: 12640.00000.

GBIFID: 3872979218; Occurrence Remarks: Alive on road AOR;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3888852251; Occurrence Remarks: Head hiding;; Coordinate Uncertainty in Meters: 28957.00000.

GBIFID: 3892647723; Occurrence Remarks: I rescued (?) this beautiful Black-tailed Rattlesnake out of the middle of the road near Rustler Park. It really wasnt in much danger; the road might have had one car come by every 10 or 20 minutes. Just my luck.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3892322998; Occurrence Remarks: on the trail near Balanced Rock;; Coordinate Uncertainty in Meters: 61.00000.

GBIFID: 3902738684; Occurrence Remarks: DOR;; Coordinate Uncertainty in Meters: 29146.00000.

GBIFID: 3902588315; Occurrence Remarks: Cave Creek Canyon Cave Creek Ranch;; Coordinate Uncertainty in Meters: 122.00000.

GBIFID: 3902973158; Occurrence Remarks: Snake was spotted on NM Hwy. 12 and was moved off to right-of-way in direction it was moving.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 3903370093; Occurrence Remarks: five-six feet;; Coordinate Uncertainty in Meters: 1841.00000.

GBIFID: 3903224610; Occurrence Remarks: Dead on road, alas.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 3903028945; Occurrence Remarks: Basking in situ;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 910490659; Occurrence Remarks: Crotalus molossus. Molino Basin, Santa Catalina Mountains, Pima County, Arizona, USA. 18 September 2012.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3903177063; Occurrence Remarks: Seemed to have a prolapse of some kind near the rattle;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3912198116; Occurrence Remarks: A blackàtail;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 3947427424; Occurrence Remarks: This is a NORTHERN (not Western) Black Tailed Rattlesnake.;; Coordinate Uncertainty in Meters: 1076.00000.

GBIFID: 891102828; Occurrence Remarks: pair of large adults;; Coordinate Uncertainty in Meters: 28930.00000.

GBIFID: 3947395541; Occurrence Remarks: Relocated by staff for visitor and staff safety;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 3961345053; Occurrence Remarks: cholla stuck in mouth :(;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1883469236; Occurrence Remarks: Observed just off a trail in the mountain foothills;; Coordinate Uncertainty in Meters: 16031.00000.

GBIFID: 4011655176; Occurrence Remarks: Seen September 2021 & have trying to verify the species since then.;; Coordinate Uncertainty in Meters: 803.00000.

GBIFID: 4028607299; Occurrence Remarks: In Aravaipa Canyon.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1890070045; Occurrence Remarks: Moving across road.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1890070484; Occurrence Remarks: Moving across road.;; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 32.389886, -112.801833: : 4/8/2026: Craig Fischer: 8 Apr 2026 ; Coordinate Uncertainty in Meters: 29120.00000.

Cochise, Arizona: 31.922535, -109.25253: : 7/19/2018: David Andreas de Rivera T°nnessen: 19 Jul 2018 :

GBIFID: 4091967554; Occurrence Remarks: Did not see the tail because rock was blocking view. Respected this big rattlesnake by keeping my distance and leaving quickly.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4091531636; Occurrence Remarks: DOR with head and rattle removed by some $#%@$%;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4096837025; Occurrence Remarks: foy;; Coordinate Uncertainty in Meters: 2124.00000.

GBIFID: 4096906658; Occurrence Remarks: After about 400 miles since the first of the year my first Rattlesnake of 2023.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4102635787; Occurrence Remarks: Got buzzed by this one in the wash just west of the homestead. Didnt get a great look at it- was heading for cover immediately, but I think its a black-tailed?;; Coordinate Uncertainty in Meters: 227.00000.

GBIFID: 1899779273; Occurrence Remarks: Road Cruised;; Coordinate Uncertainty in Meters: 122.00000.

GBIFID: 4102968668; Occurrence Remarks: On the road into Fort Bowie National Historic Site;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4111873312; Occurrence Remarks: My first rattlesnake of the season. I didnÆt know black-taileds got down so low in elevation!;; Coordinate Uncertainty in Meters: 22.00000.

GBIFID: 4126758971; Occurrence Remarks: Pic was taken by hiker at Tumamoc Hill trail;; Coordinate Uncertainty in Meters: 201.00000.

GBIFID: 1913191979; Occurrence Remarks: Photo credit: Laura Dearness;; Coordinate Uncertainty in Meters: 28930.00000.

GBIFID: 2397459935; Occurrence Remarks: This blacktailed rattlesnake gave us a warning with his rattle but he was already in the brush so photo does not show his black tail. He moved away very quickly.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4153748737; Occurrence Remarks: 14 rattles!;; Coordinate Uncertainty in Meters: 35.00000.

GBIFID: 4162525801; Occurrence Remarks: Location approx. to protect natural resources;; Coordinate Uncertainty in Meters: 357.00000.

GBIFID: 4171453846; Occurrence Remarks: Terrible photo, but I was holding up traffic and just needed to get it off the road.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 5086933168; Occurrence Remarks: Found by students in front of shower block of Dorm Building at SWRS;; Coordinate Uncertainty in Meters: 35.00000.

GBIFID: 4172024494; Occurrence Remarks: DOR Sonoran Black-tailed Rattlesnake (Crotalus molossus), Graham County, Arizona;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 4171861273; Occurrence Remarks: hanging in the parking lot;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 4177578686; Occurrence Remarks: DOR The tail fluoresces;; Coordinate Uncertainty in Meters: 29093.00000.

GBIFID: 4177295776; Occurrence Remarks: 70F 2! pic of each;; Coordinate Uncertainty in Meters: 29093.00000.

GBIFID: 4400161131; Occurrence Remarks: 88F, wash walking cool, very pale or faded pattern;; Coordinate Uncertainty in Meters: 29146.00000.

GBIFID: 4405151877; Occurrence Remarks: On main tour route at CCMP. Catch and release away from people for safety.;; Coordinate Uncertainty in Meters: 35.00000.

GBIFID: 4407162038; Occurrence Remarks: DOR.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 4407162039; Occurrence Remarks: DOR.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 1135208365; Occurrence Remarks: Resting on road. After photos, it coiled and then moved off road.;; Coordinate Uncertainty in Meters: 196.00000.

GBIFID: 4413748596; Occurrence Remarks: fresh neonate;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 4416925178; Occurrence Remarks: Marvin;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4424279233; Occurrence Remarks: Another snake saved from the road;; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 4946489241; Occurrence Remarks: Dead on road;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 4430982716; Occurrence Remarks: molossus x ornatus intergrade.;; Coordinate Uncertainty in Meters: 28984.00000.

GBIFID: 1948755726; Occurrence Remarks: C. m. molossus Scanned from 35mm slide;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4438878242; Occurrence Remarks: Dead in road;; Coordinate Uncertainty in Meters: 384.00000.

GBIFID: 4453749139; Occurrence Remarks: Small. Could hardly hear the rattle when passing by. Thought it was an insect. Suspended on a desert shrub. Sun just coming over this canyon in the Rincons. Zoomed in with my Samsung 10x so I wouldnt harass/disturb it.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4500916419; Occurrence Remarks: Found in South Western U.S primarily terrestrial deserts and mountains. In the summers they turn into a nocturnal behavior and in winter hibernate.;; Coordinate Uncertainty in Meters: 3264.00000.

GBIFID: 4510415443; Occurrence Remarks: Not my observation. Documented in the riparian near shake tree canyon by former FS biologist Shannon Lacie in 2008. Uploading to document for the Forest and the public.;; Coordinate Uncertainty in Meters: 87.00000.

GBIFID: 4512347416; Occurrence Remarks: forgot to post from last AZ trip;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 1143555857; Occurrence Remarks: ~20 inches, roadkill in park;; Coordinate Uncertainty in Meters: 128.00000.

GBIFID: 3408223329; Occurrence Remarks: A light colored individual, a typical low desert morph.;; Coordinate Uncertainty in Meters: 77092.00000.

GBIFID: 3408188316; Occurrence Remarks: Another low desert molo.;; Coordinate Uncertainty in Meters: 77092.00000.

GBIFID: 4607571917; Occurrence Remarks: Not familiar with AZ Crotalus;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2006054014; Occurrence Remarks: This scarred and brutal looking molossus was seen in a mine shaft 3 feet from another. A male and female 20 feet in of a mineshaft in winter. Both have had a hard life but seemed to have a bond for sure. I canÆt find the picture of both next to each other but will add it when I do. This was in 2008;; Coordinate Uncertainty in Meters: 4133.00000.

GBIFID: 2006053950; Occurrence Remarks: These were digital photos from 2005 when Sony had memory sticks. This was one of the coolest finds as it was next to a natural arch.;; Coordinate Uncertainty in Meters: 3598.00000.

GBIFID: 4855465841; Occurrence Remarks: Black-tailed Rattlesnake (Crotalus molossus); Hot Springs Canyon, E of Cascabel, AZ;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4855383279; Occurrence Remarks: Northern Black-tailed Rattlesnake (Crotalus molossus molossus); Adobe Wall dam, N of Redfield Canyon, E of Redington, AZ;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4901358747; Occurrence Remarks: No snake only photoà moving super slow. Slim like it just came out for the season. Heading from wash to the slope though. Seasons are very different and see a lot less snakes anymore, on all dirt roads I travel. We just snap some pics, and let them crawl by or encourage them to get off the road so they arenÆt ran over.;; Coordinate Uncertainty in Meters: 29146.00000.

GBIFID: 4908979254; Occurrence Remarks: 5500 feet elevation in a riparian canyon.;; Coordinate Uncertainty in Meters: 29120.00000.

GBIFID: 4921591162; Occurrence Remarks: sorry, video screenshots;; Coordinate Uncertainty in Meters: 28.00000.

GBIFID: 4923870629; Occurrence Remarks: 83F, cloudy 3.5;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 4924056804; Occurrence Remarks: Young snake. Seems to be about a year old. Never rattled at me at all.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4926294069; Occurrence Remarks: Western Black-tailed Rattlesnake (Crotalus molossus), Graham County, Arizona;; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 4936580396; Occurrence Remarks: Shed collected; I made some effort to see this species this summer, but all I found was this shed and an old corpse nailed to the wall of a mine shaft;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4935975810; Occurrence Remarks: Dead and missing both head and rattle; hiked with @birdnerd10; duplicate of one of his observations Possibly a rather old carcass, though it did retain an odor. We had hiked to the mine shaft with the specific intent of seeing this speciesùa shame that someone with bad intentions likely beat us to it.;; Coordinate Uncertainty in Meters: 23.00000.

GBIFID: 4946290877; Occurrence Remarks: Observed during a herp survey in the wash that parallels TT trail. Location approx;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4945563387; Occurrence Remarks: Observed during a herp survey in the wash that parallels TT trail. location approx;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4945490092; Occurrence Remarks: observed during a herp survey. Location approx;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4945762558; Occurrence Remarks: observed during a herp survey at Granite Mountain;; Coordinate Uncertainty in Meters: 1189.00000.

GBIFID: 4950399076; Occurrence Remarks: Mating pair;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2242856624; Occurrence Remarks: Saw this rattler at the Boyce Thompson Arboretum outside ofSuperior AZ.;; Coordinate Uncertainty in Meters: 1942.00000.

GBIFID: 4954499447; Occurrence Remarks: A very healthy and mature snake;; Coordinate Uncertainty in Meters: 29093.00000.

GBIFID: 4987647663; Occurrence Remarks: Ventana Canyon trail.;; Coordinate Uncertainty in Meters: 1800.00000.

GBIFID: 5008053854; Occurrence Remarks: Western rattle snack, found on Tumomac walking trail in Tucson, AZ. Recognizable by the scaled rattler on end of snakes tail. You can hear them when youÆre close. Venomous creatures.;; Coordinate Uncertainty in Meters: 33.00000.

GBIFID: 5036980441; Occurrence Remarks: Mating.;; Coordinate Uncertainty in Meters: 29120.00000.

GBIFID: 2269257632; Occurrence Remarks: Missing its rattle;; Coordinate Uncertainty in Meters: 28930.00000.

GBIFID: 2283064166; Occurrence Remarks: 2010 Southeast Arizona Herping Trip;; Coordinate Uncertainty in Meters: 29120.00000.

GBIFID: 2283062960; Occurrence Remarks: 2010 Southeast Arizona Herping Trip;; Coordinate Uncertainty in Meters: 29120.00000.

GBIFID: 2283072292; Occurrence Remarks: 2010 Southeast Arizona Herping Trip;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 2283093814; Occurrence Remarks: still from video.;; Coordinate Uncertainty in Meters: 519.00000.

GBIFID: 2283164043; Occurrence Remarks: Snake was resting in fixtures for hot tub.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2283269039; Occurrence Remarks: Same snake from 30 minutes earlier.;; Coordinate Uncertainty in Meters: 12.00000.

GBIFID: 1265562164; Occurrence Remarks: A first for me! Less than ten minutes after I had seen the Gila monster, I encountered this rattlesnake. It was my first of the year, and Im pretty sure its the first time Ive ever seen both critters on the same hike. This was one healthy-looking (and large) snake. Quite docile, too. Another hiker and I watched him for several minutes (we tried to stay together so he wouldnt feel hemmed in) and he never rattled or coiled. We agreed that he perhaps was out for his first hunt of the season. He eventually slithered into some nearby vegetation, and we resumed our hikes. As was the Gila monster, the black-tailed rattlesnake was seen on the Wildhorse Trail in Saguaro National Park. Right on the trail!;; Coordinate Uncertainty in Meters: 276.00000.

GBIFID: 2311369584; Occurrence Remarks: Probably roadkilled;; Coordinate Uncertainty in Meters: 6286.00000.

GBIFID: 5231900544; Occurrence Remarks: Black-Tailed Rattlesnake - Crotalus molossus Out looking for owls in Cave Creek Canyon, we stopped so our guide Dave could gently encourage this basking snake to move off the road. It retreated to a rock ledge not far away. Approaching carefully, I was able to get some photos at a safe distance with a telephoto lens. Happy World Snake Day (16 July 2025)!;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 5230203805; Occurrence Remarks: low elevation morph;; Coordinate Uncertainty in Meters: 28874.00000.

GBIFID: 2350354578; Occurrence Remarks: Two males engaged in ritual combat dance.;; Coordinate Uncertainty in Meters: 195.00000.

GBIFID: 2350447543; Occurrence Remarks: I have pictures of the tail and full body, if necessary.;; Coordinate Uncertainty in Meters: 1841.00000.

GBIFID: 1453085876; Occurrence Remarks: VERY lively. Second Black-tailed rattlesnake Ive already seen this spring. Last one was in the Dragoon Mountains of SE Arizona. This one was along Aravaipa Creek a mile or two in from the east trailhead of Aravaipa Canyon.;; Coordinate Uncertainty in Meters: 1145278.00000.

GBIFID: 1269561177; Occurrence Remarks: Black-tailed Rattlesnake coiled next to the trail;; Coordinate Uncertainty in Meters: 55.00000.

GBIFID: 2465219044; Occurrence Remarks: Family : Viperidae;; Coordinate Uncertainty in Meters: 6593.00000.

GBIFID: 891732510; Occurrence Remarks: This was a radio-tracked individual, part of a long term study.;; Coordinate Uncertainty in Meters: 29066.00000.

GBIFID: 2574288883; Occurrence Remarks: Exact location obscured;; Coordinate Uncertainty in Meters: 29120.00000.

GBIFID: 2580091485; Occurrence Remarks: Think it is a C. molossus but couldnt get a better view of it.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1306585081; Occurrence Remarks: Observed under a rock in a wash.;; Coordinate Uncertainty in Meters: 125315.00000.

GBIFID: 1315075782; Occurrence Remarks: Seen on Tumamoc Hill Roadway.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1831122880; Occurrence Remarks: A very dehydrated female on the road quite some distance (several football fields) away from any mountainous terrain...;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 2609334827; Occurrence Remarks: Same snake seen approximately 1.5 hours later 16 feet from this location.;; Coordinate Uncertainty in Meters: 29146.00000.

GBIFID: 2634292517; Occurrence Remarks: Waiting in ambush;; Coordinate Uncertainty in Meters: 28930.00000.

GBIFID: 3070279342; Occurrence Remarks: In situe and after;; Coordinate Uncertainty in Meters: 28984.00000.

GBIFID: 2826264532; Occurrence Remarks: Moving across road.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2850898034; Occurrence Remarks: Observation made in very low light conditions. Sorry about the poor quality.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 2864646966; Occurrence Remarks: Just below resort Castle Hot Springs. Air and dirt road temp both 85F.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 2864755794; Occurrence Remarks: Another big adult male. Air and road temp 82F.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 2864596985; Occurrence Remarks: DOR salvaged for museum;; Coordinate Uncertainty in Meters: 22.00000.

GBIFID: 2864856721; Occurrence Remarks: Another DOR shortly after the last one. Road temp 70 air temp 58. Also salvaged for museum. This one is still squirming. Very close to pavement end on the way up to Young.;; Coordinate Uncertainty in Meters: 22.00000.

GBIFID: 2883037791; Occurrence Remarks: Had a green hue;; Coordinate Uncertainty in Meters: 1449.00000.

GBIFID: 3044863592; Occurrence Remarks: Skin from a fresh road-killed snake. Took it home and ate it. DonΓÇÖt know that IΓÇÖd mistake it for chicken but it wasnΓÇÖt bad. Actually it had been left for dead so I dropped a rock on its head. Very sad...;; Coordinate Uncertainty in Meters: 524.00000.

GBIFID: 3070447481; Occurrence Remarks: Park Rangers had just caught this snake to move him away from the public areas of the park, it was not happy about it!;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3079773534; Occurrence Remarks: Recently dead in Saguaro NP;; Coordinate Uncertainty in Meters: 9735.00000.

GBIFID: 3079609100; Occurrence Remarks: adult female waiting near a Neotoma nest. Location based on map.;; Coordinate Uncertainty in Meters: 1110.00000.

GBIFID: 3090604191; Occurrence Remarks: crossing the road. Location based on map.;; Coordinate Uncertainty in Meters: 111.00000.

GBIFID: 3090966354; Occurrence Remarks: moving across the road. Notes on dates lost but was in July.;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 3090972404; Occurrence Remarks: Near a dry riverbed. Notes on dates lost but was in July.;; Coordinate Uncertainty in Meters: 1110.00000.

GBIFID: 4935975192; Occurrence Remarks: Observed by the Mullen family while driving on Paradise Road, near West Portal Road. Imaged by Laura Mullen.;; Coordinate Uncertainty in Meters: 56.00000.

GBIFID: 3109052724; Occurrence Remarks: In Saguaro National Park East on Garwood just south of Converse;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 3109316159; Occurrence Remarks: Ford Canyon;; Coordinate Uncertainty in Meters: 244.00000.

GBIFID: 1586955274; Occurrence Remarks: Mating pair. Male pictured in first photo. Male to left and female to right in 3rd photo;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1621780784; Occurrence Remarks: AOR on Portal Paradise Road;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1640088740; Occurrence Remarks: Cochise County, Arizona, US Awesome watching @bogslogger wrangle this snake into position for nice photos. Thanks @sambiology for helping direct the group for quiet so that I could make a sound recording of the rattle.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1640101104; Occurrence Remarks: Road fatality;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 3113413283; Occurrence Remarks: Definitely heard a rattle.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 3113607636; Occurrence Remarks: did not see the tail, little one - maybe 8-10 inches in their little curl there;; Coordinate Uncertainty in Meters: 347.00000.

GBIFID: 1024197197; Occurrence Remarks: Two snakes, appear to be copulating.;; Coordinate Uncertainty in Meters: 76.00000.

GBIFID: 1668846209; Occurrence Remarks: The group went to several spots in the Chiricahua Mountains -- each spot had a mix of different species that all appeared new to me. Still working on the IDs for these... Check out the journal entry for lots of better photos of many of these same species: Coordinate Uncertainty in Meters: 14.00000.

GBIFID: 3325665195; Occurrence Remarks: Rattlesnake on trail ascending to Gila Cliff Dwellings, mid-day;; Coordinate Uncertainty in Meters: 5079.00000.

GBIFID: 1703234032; Occurrence Remarks: Large adult, may have sustained injuries on roadway, yet no obvious wounds.;; Coordinate Uncertainty in Meters: 66.00000.

GBIFID: 3338145673; Occurrence Remarks: DOR. Both snakes were found together in center of road apparently run over at the same time by a vehicle. Snakes were found belly sides up and were moved to the breakdown lane and laid out dorsal sides up to be photographed. It seems odd to this observer that both snakes would be found together at this time of year. Comments are welcome offering possible explanations for this.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 3344099630; Occurrence Remarks: indecisive rattlesnake;; Coordinate Uncertainty in Meters: 148.00000.

GBIFID: 1802735148; Occurrence Remarks: Crotalus molossus, northwest side of the Black Range, north side of Taylor Creek between Steer Mesa Tank and Alexander Canyon, Catron County, New Mexico, 21 Jul 2013.;; Coordinate Uncertainty in Meters: 500.00000.

GBIFID: 1805387069; Occurrence Remarks: Western Black-tailed Rattlesnake (Crotalus molossus);; Coordinate Uncertainty in Meters: 1841.00000.

GBIFID: 3455627949; Occurrence Remarks: Pics to add;; Coordinate Uncertainty in Meters: 28984.00000.

Cochise, Arizona: 31.906513, -109.157905: : 8/4/2025: Joshua Wade Covill: 4 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Cochise, Arizona: 32.010711, -109.311913: : 8/20/2025: sierrabrooks: 20 Aug 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Cochise, Arizona: 31.934203, -109.219003: : 9/26/2025: mharger: 26 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Yavapai, Arizona: 33.989035, -112.289168: : 8/24/2025: Steve DaCosta: 24 Aug 2025 ; Coordinate Uncertainty in Meters: 28902.00000.

Occurrence Remarks: Adult blacktail seen on the edge of the road while driving shortly after sunset. We stopped and took photos while the snake moved off the road. Very calm and beautiful rattlesnake.; Coordinate Uncertainty in Meters: 29146.00000.

Occurrence Remarks: Snake skin found in a crevice under a large rock.; Coordinate Uncertainty in Meters: 29039.00000.

Maricopa, Arizona: 33.356551, -113.243378: : 8/20/2025: Madison Lutes: 20 Aug 2025 ; Coordinate Uncertainty in Meters: 28984.00000.

Cochise, Arizona: 31.918071, -109.137127: : 8/27/2025: Erik Atwell: 27 Aug 2025 ; Coordinate Uncertainty in Meters: 29173.00000.

Unknown, New Mexico: 33.20358, -108.213662: : 7/7/2026: stempkm: 7 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Male, based on behavior; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Female, based on behavior; Coordinate Uncertainty in Meters: 2.00000.

Pima, Arizona: 32.329455, -110.797142: : 8/29/2025: Erik Atwell: 29 Aug 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: 82F Individual on left Same individual as @natricineguy and @risky_business; Coordinate Uncertainty in Meters: 29146.00000.

Occurrence Remarks: Lifer; Coordinate Uncertainty in Meters: 29120.00000.

La Paz, Arizona: 33.408873, -113.83713: : 9/3/2025: Jorge Aguilera: 3 Sep 2025 ; Coordinate Uncertainty in Meters: 28957.00000.

Pinal, Arizona: 32.581032, -110.847175: : 9/4/2025: djdeeznutz: 4 Sep 2025 ; Coordinate Uncertainty in Meters: 32.00000.

Cochise, Arizona: 31.883753, -109.207437: : 9/5/2025: Wolfgang W├╝ster: 5 Sep 2025 ; Coordinate Uncertainty in Meters: 43.00000.

Cochise, Arizona: 31.935214, -109.281733: : 8/16/2025: Quinn Campbell: 16 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Grant, New Mexico: 33.018847, -108.552728: : 9/4/2025: jakekuschel: 4 Sep 2025 ; Coordinate Uncertainty in Meters: 10.00000.

Grant, New Mexico: 33.016197, -108.553337: : 9/6/2025: jakekuschel: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 17.00000.

Unknown, New Mexico: 33.278006, -108.634324: : 6/30/2026: jcscoggins: 30 Jun 2026 ; Coordinate Uncertainty in Meters: 5659.00000.

Maricopa, Arizona: 33.342456, -112.038065: : 9/4/2025: brandonlat: 4 Sep 2025 ; Coordinate Uncertainty in Meters: 124.00000.

Unknown, Arizona: 32.354553, -111.142635: : 7/17/2026: Alison Boelts: 17 Jul 2026 ; Coordinate Uncertainty in Meters: 1463.00000.

Occurrence Remarks: Snake body and tail going into rock; Coordinate Uncertainty in Meters: 18.00000.

Cochise, Arizona: 31.927862, -109.981583: : 8/8/2025: brandonlat: 8 Aug 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Occurrence Remarks: Large black tail observed crossing the road in late morning. We stopped for it and approached and it became defensive. We took some pictures and then helped it across the road in the direction it had been crossing.; Coordinate Uncertainty in Meters: 29173.00000.

Occurrence Remarks: Adult black tail seen crossing a road. We stopped, took photos, and helped it across the road in the direction it was crossing.; Coordinate Uncertainty in Meters: 29173.00000.

Unknown, New Mexico: 33.238563, -108.231772: : 7/17/2026: stempkm: 17 Jul 2026 ; Coordinate Uncertainty in Meters: 22.00000.

Greenlee, Arizona: 33.43165, -109.11348: : 9/6/2025: kheren: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 3880.00000.

Unknown, New Mexico: 32.749786, -108.538409: : 4/17/2026: jeffyeo: 17 Apr 2026 ; Coordinate Uncertainty in Meters: 201.00000.

Unknown, Arizona: 32.008756, -109.368609: : 7/23/2026: kenzingtonscarlet: 23 Jul 2026 ; Coordinate Uncertainty in Meters: 66.00000.

Unknown, New Mexico: 32.931137, -108.451667: : 7/23/2026: Natalie: 23 Jul 2026 ; Coordinate Uncertainty in Meters: 14.00000.

Mohave, Arizona: 36.300682, -112.919623: : 9/26/2025: timheaton: 26 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 34.891803, -111.838263: : 10/15/2025: Michele Zimmerman: 15 Oct 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Arizona: 34.791837, -111.625747: : 3/31/2026: J David Terrell: 31 Mar 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Arizona: 34.640064, -111.929338: : 3/28/2026: markmalt: 28 Mar 2026 ; Coordinate Uncertainty in Meters: 88.00000.

Occurrence Remarks: Seen on the Sterling Pass Trail to Vultee Arch; Coordinate Uncertainty in Meters: 10926.00000.

Yavapai, Arizona: 34.921495, -111.84082: : 10/23/2025: loveyshuman: 23 Oct 2025 ; Coordinate Uncertainty in Meters: 17.00000.

GBIFID: 1836634849; Occurrence Remarks: Black tail Rattler (green tint to color) found on trail to fossil creek near Strawberry Az;; Coordinate Uncertainty in Meters: 28818.00000.

Unknown, Arizona: 34.617497, -112.428803: : 4/28/2026: kiminak: 28 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Unknown, Arizona: 34.32233, -111.453513: : 5/3/2026: gwentomologist: 3 May 2026 ; Coordinate Uncertainty in Meters: 16.00000.

Unknown, Arizona: 34.511933, -111.927513: : 5/10/2026: nitro_the_wolf: 10 May 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Unknown, Arizona: 34.636743, -112.576258: : 4/17/2026: atroxitha: 17 Apr 2026 ; Coordinate Uncertainty in Meters: 4610.00000.

Unknown, Arizona: 34.419911, -111.79861: : 5/10/2026: johnny_ruckntustle: 10 May 2026 ; Coordinate Uncertainty in Meters: 389.00000.

Occurrence Remarks: Unfortunately perished by getting caught in a chicken wire fence after heavily eating...; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Arizona: 34.5995, -112.3961: : 4/10/2026: dubbalubagis: 10 Apr 2026 ; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 3416079762; Occurrence Remarks: Saw this big ol guy on the road up Airport Mesa in Sedona, AZ at sunset.;; Coordinate Uncertainty in Meters: 228.00000.

GBIFID: 3902945123; Occurrence Remarks: Just hit by oncoming vehicle;; Coordinate Uncertainty in Meters: 122.00000.

GBIFID: 3963537065; Occurrence Remarks: First picture shows the snakeÆs head and body sticking out from behind the log, second picture shows its tail draped over the log.;; Coordinate Uncertainty in Meters: 342.00000.

GBIFID: 4936716710; Occurrence Remarks: Sure made a racket in the bush and was not happy with me passing on the trail!;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2242752553; Occurrence Remarks: Grand Canyon Pink Rattlesnake Crotalus oreganus abyssus Fern Glen Canyon;; Coordinate Uncertainty in Meters: 100.00000.

GBIFID: 4936967908; Occurrence Remarks: Big, maybe 3.5 ft. Big head and few rattles. IÆm guessing it was a female. Very green in coloration but looked too dark and big to be Mojave green.;; Coordinate Uncertainty in Meters: 123.00000.

GBIFID: 5154596560; Occurrence Remarks: Seen on trail while hiking up Sterling Pass toward Vultee Arch;; Coordinate Uncertainty in Meters: 63.00000.

GBIFID: 5188271624; Occurrence Remarks: Base of rattle was colored with paint pen by biologist for identification when captured 6 days prior. Snake was previously identified as male.;; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 5188162364; Occurrence Remarks: Captured on the park trail the evening before. Processed by biologist and released nearby. Snake was determined to be male and measured over 40 in. The same snake was seen at the same location on 4/25.;; Coordinate Uncertainty in Meters: 30.00000.

Mohave, Arizona: 36.088951, -113.340679: : 4/15/2017: Rob of the wildernessvagabond.com: 15 Apr 2017 :
GBIFID: 2294549732; Occurrence Remarks: Black-Tailed Rattlesnake, Crotalus molossus Photographed in Tuckup area, near 150-mile drainage, Esplanade level. Pregnant female.;; Coordinate Uncertainty in Meters: 27538.00000.

GBIFID: 5198382678; Occurrence Remarks: Black tail was fairly faint, stripes visible through the black. About 3 feet long or so. Nice greenish-yellow color.;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 2460125960; Occurrence Remarks: Juvenile Black-tailed Rattlesnake (Crotalus molossus), Sedona, Arizona.;; Coordinate Uncertainty in Meters: 9730.00000.

GBIFID: 2460030239; Occurrence Remarks: Black-tailed Rattlesnake (Crotalus molossus), Red Rock State Park, Sedona, Arizona.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2641408750; Occurrence Remarks: Just hit by vehicle.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1621798854; Occurrence Remarks: Crossed our path while leading a tour out at Palaki;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 1024217012; Occurrence Remarks: This friendly lady (we decided it was a lady) was hiding out under vegetation, trying to appear inconspicuous. When she finally spooked, she moved away and shook her black tail at me, so Im wondering if she isnt a Black-tailed Rattlesnake (C. molossus). If you look close you can see my reflection in her eye! Thanks for any help on ID!;; Coordinate Uncertainty in Meters: 27.00000.

GBIFID: 3337579860; Occurrence Remarks: Nestled in some small green plants in center, head facing forward;; Coordinate Uncertainty in Meters: 4.00000.

Coconino, Arizona: 34.865017, -111.753227: : 8/24/2025: mlicher: 24 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Yavapai, Arizona: 34.345377, -111.944408: : 9/3/2025: Rachael Warburton: 3 Sep 2025 ; Coordinate Uncertainty in Meters: 2145.00000.