Agkistrodon contortrix contortrix
Southern Copperhead
Agkistrodon contortrix laticinctus
Broad-Banded Copperhead
Agkistrodon contortrix mokasen
Northern Copperhead
Agkistrodon contortrix pictigaster
Trans-Pecos Copperhead
Agkistrodon piscivorus conanti
Florida Cottonmouth
Agkistrodon piscivorus leucostoma
Western Cottonmouth
Agkistrodon piscivorus piscivorus
Eastern Cottonmouth
Crotalus adamanteus
Eastern Diamondback Rattlesnake
Crotalus atrox
Western Diamondback Rattlesnake
Crotalus cerastes cercobombus
Sonoran Sidewinder
Crotalus horridus
Timber Rattlesnake
Crotalus lepidus klauberi
Banded Rock Rattlesnake
Crotalus lepidus lepidus
Mottled Rock Rattlesnake
Crotalus mitchellii pyrrhus
Southwestern Speckled Rattlesnake
Crotalus mitchellii stephensi
Panamint Speckled Rattlesnake
Crotalus molossus molossus
Blacktail Rattlesnake
Crotalus oreganus abyssus
Grand Canyon Rattlesnake
Crotalus oreganus cerberus
Arizona Black Rattlesnake
Crotalus oreganus concolor
Midget Faded Rattlesnake
Crotalus oreganus helleri
Southern Pacific Rattlesnake
Crotalus oreganus lutosus
Great Basin Rattlesnake
Crotalus oreganus oreganus
Northern Pacific Rattlesnake
Crotalus ruber ruber
Red Diamond Rattlesnake
Crotalus scutulatus scutulatus
Mohave Rattlesnake
Crotalus tigris
Tiger Rattlesnake
Crotalus vegrandis
Uracoan Rattlesnake
Crotalus viridis nuntius
Hopi Rattlesnake
Crotalus viridis viridis
Prairie Rattlesnake
Micrurus fulvius
Eastern Coral Snake
Micrurus tener tener
Texas Coral Snake
Naja melanoleuca
Forest Cobra
Naja pallida
Red Spitting Cobra
Sistrurus catenatus edwardsii
Desert Massasauga
Sistrurus catenatus tergeminus
Western Massasauga
Sistrurus miliarius barbouri
Dusky Pigmy Rattlesnake
Sistrurus miliarius streckeri
Western Pygmy Rattlesnake