Ryan Collister:
Tamaulipan Rock Rattlesnake, Crotalus lepidus morulus
Ryan Collister:
Eastern twin-spotted rattlesnake, Crotalus pricei miquehannus
Ryan Collister:
Tamaulipan Rock Rattlesnake, Crotalus lepidus morulus
Ryan Collister:
Sceloporus minor/oberon?
Ryan Collister:
Sceloporus minor/oberon?
Ryan Collister:
Sceloporus minor/oberon?
Ryan Collister:
Tamaulipan Rock Rattlesnake, Crotalus lepidus morulus
Ryan Collister:
Mexican black-necked garter snake, Thamnophis pulchrilatus
Ryan Collister:
Tamaulipan Rock Rattlesnake, Crotalus lepidus morulus
Ryan Collister:
Tamaulipan rock rattlesnake, Crotalus lepidus morulus
Ryan Collister:
Mexican black-tailed rattlesnake, Crotalus molossus nigrescens
Ryan Collister:
Mexican pine snake, Pituophis deppei
Ryan Collister:
Tarantula, Aphonophelma sp?
Ryan Collister:
Tillandsia in bloom
Ryan Collister:
Tamaulipan rock rattlesnake, Crotalus lepidus morulus
Ryan Collister:
Imbricate alligator lizard, Barisia imbricata
Ryan Collister:
Tamaulipan rock rattlesnake, Crotalus lepidus morulus
Ryan Collister:
Cool Habitat in Nuevo Leon
Ryan Collister:
Big Ol' Barrel Cactus, Coahuila
Ryan Collister:
Mexican black-tailed rattlesnake, Crotalus molossus nigrescens
Ryan Collister:
Mexican pine snake, Pituophis deppei