Nathan Shepard:
Crotalus lepidus klauberi
Nathan Shepard:
Crotalus willardi willardi
Nathan Shepard:
Crotalus scutulatus
Nathan Shepard:
Crotalus atrox
Nathan Shepard:
Crotalus willardi willardi
Nathan Shepard:
Crotalus molossus
Nathan Shepard:
Scaphiopus couchii
Nathan Shepard:
Bufo cognatus
Nathan Shepard:
Crotalus atrox
Nathan Shepard:
Crotalus cerberus