Western Black-tailed Rattlesnake (Crotalus molossus)—Southeast Arizona
Black-headed Bushmaster (Lachesis melanocephala)—Osa Peninsula, Costa Rica
Red Diamond Rattlesnake (Crotalus ruber)—Southern California
Diamondback Watersnake (Nerodia rhombifer) eating an American Bullfrog (Lithobates catesbeianus)—North Texas
Diamondback Watersnake (Nerodia rhombifer) foraging—South Texas
Northern Cottonmouth (Agkistrodon piscivorus)—North Texas
Mojave Rattlesnake (Crotalus scutulatus)—West Texas
Prairie Rattlesnake (Crotalus viridis)—West Texas
Arizona Black Rattlesnake (Crotalus cerberus)—Southeast Arizona
Western Diamond-backed Rattlesnake (Crotalus atrox)—West Texas
Ornate Black-tailed Rattlesnake (Crotalus ornatus)—West Texas
Broad-banded Copperhead (Agkistrodon laticinctus)—West Texas
Mottled Rock Rattlesnake (Crotalus lepidus lepidus)—West Texas
Western Black-tailed Rattlesnake (Crotalus molossus) climbing Ocotillo—Southeast Arizona
Eastern Black-tailed Rattlesnake (Crotalus ornatus)—West Texas
Juvenile Spotted Lancehead (Bothrops punctatus)—Colombian Chocó
Juvenile Spotted Lancehead (Bothrops punctatus) caudal luring—Colombian Chocó
Eastern Hognose Snake (Heterodon platirhinos)—North Texas
Ujarran Hognose Viper (Porthidium volcanicum)—Puntarenas Province, Costa Rica
Western Diamondback Rattlesnake (Crotalus atrox)—South Texas
Western Mudsnake (Farancia abacura reinwardtii)—North Texas
Side-striped Palm Pit Viper (Bothriechis lateralis)—Alajuela Province, Costa Rica
Eyelash Viper (Bothriechis schlegelii)—Alajuela Province, Costa Rica
Eyelash Viper (Bothriechis schlegelii)—Heredia Province, Costa Rica
Rainforest Hog-nosed Viper (Porthidium nasutum)—Colombian Chocó
Tiger Rattlesnake (Crotalus tigris)—Southeast Arizona
Timber Rattlesnake (Crotalus horridus)—North Texas
Western Diamondback Rattlesnake (Crotalus atrox)—West Texas
Diamondback Watersnake (Nerodia rhombifer)–North Texas
Gray-banded Kingsnake (Lampropeltis alterna)—West Texas
Gray Earth Snake (Geophis brachycephalus)—Alajuela Province, Costa Rica
Western Massasauga (Sistrurus tergeminus)—North Texas
Banded Rock Rattlesnake (Crotalus lepidus klauberi)—Southeast Arizona
Sonoran Desert Sidewinder (Crotalus cerastes cercobombus)—Southeast Arizona
Southwestern Speckled Rattlesnake (Crotalus pyrrhus)—Southern California
Lined Snake (Tropidoclonion lineatum)—West Texas
Central American Jumping Pit Viper (Metlapilcoatlus mexicanus)—Heredia Province, Costa Rica
Terciopelo (Bothrops asper)—Valle del Cauca, Colombia
