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Typhlopidae (Blindsnakes)



Leptotyphlopidae (Threadsnakes)
Plains Threadsnake (Leptotyphlops dulcis)
Western Threadsnake (Leptotyphlops humilis)


Pythonidae (Pythons)



Boidae (Boas)



Loxocemidae (American Burrowing Python)



Elapidae (Cobras, Kraits, Coral Snakes)
Eastern Coral Snake (Micrurus fulvius)
Texas Coral Snake (Micrurus tener)


Crotalidae (Pit Vipers)
Copperhead (Agkistrodon contortrix) photos added 08/13/17
Cottonmouth (Agkistrodon piscivorus)
Eastern Diamondbacked Rattlesnake (Crotalus adamanteus)
Western Diamondbacked Rattlesnake (Crotalus atrox)
Arizona Black Rattlesnake (Crotalus cerberus)
Midget-faded Rattlesnake (Crotalus concolor)
Southern Pacific Rattlesnake (Crotalus helleri)
Timber Rattlesnake (Crotalus horridus)

Rock Rattlesnake (Crotalus lepidus)

Great Basin Rattlesnake (Crotalus lutosus)
Northern Pacific Rattlesnake (Crotalus oreganus)
Black-tailed Rattlesnake (Crotalus molossus)
Mohave Rattlesnake (Crotalus scutulatus)
Panamint Rattlesnake (Crotalus stephensi)
Prairie Rattlesnake (Crotalus viridis)
Pigmy Rattlesnake (Sistrurus miliarius)

 

Colubridae (Harmless Egg-laying Snakes)
Eastern Glosssy Snake (Arizona elegans)
Trans-Pecos Ratsnake (Bogertophis subocularis)

Scarlet Snake (Cemophora coccinea)
Racer (Coluber constrictor)  photos added 08/13/17
Indigo Snake (Drymarchon melanurus)
Speckled Racer (Drymobius margaritiferus)
Gray-banded Kingsnake (Lampropeltis alterna)
photos added 08/13/17
Mole Kingsnake (Lampropeltis calligaster)

Common Kingsnake (Lampropeltis getula)
 
Durango Mountain Kingsnake (Lampropeltis [mexicana] greeri)
 
Variable Kingsnake (Lampropeltis [mexicana] leonis)
 
Sonoran Mountain Kingsnake (Lampropeltis pyromelana)

Milksnake (Lampropeltis triangulum)

Sonoran Whipsnake (Masticophis bilineatus)

Coachwhip (Masticophis flagellum)

Schott's Whipsnake (Masticophis schotti)

Striped Whipsnake (Masticophis taeniatus)

Rough Green Snake (Opheodrys aestivus)  
Smooth Green Snake (Opheodrys vernalis)
Baird's Ratsnake (Pantherophis bairdi)
Cornsnake (Pantherophis guttatus)  
Ratsnake (Pantherophis obsoletus)
photos added 08/18/17
Fox Snake (Pantherophis vulpinus) 
Gopher/Bullsnake (Pituophis catenifer)

Longnose Snake (Rhinocheilus lecontei)
Big Bend Patchnose Snake (Salvadora deserticola)  
Graham's Patchnose Snake (Salvadora grahamiae)

Green Ratsnake (Senticolis triaspis)
Big Bend Blackheaded Snake (Tantilla cucullata)

Flatheaded Snake (Tantilla gracilis)

Southwestern Blackheaded Snake (Tantilla hobartsmithi)




Natricidae (Harmless Live-bearing Snakes)
Saltmarsh Snake (Nerodia clarki)
Plain-bellied Watersnake (Nerodia erythrogaster)  
Banded Watersnake (Nerodia fasciata)  photos added 08/18/17
Northern Watersnake (Nerodia sipedon)
photos added 08/13/17
Diamondbacked Watersnake (Nerodia rhombifer)  
Glossy Crayfish Snake (Regina rigida)
Black Swamp Snake (Seminatrix pygea)
Red-bellied Snake (Storeria occipitomaculata)
Aquatic Gartersnake (Thamnophis atratus)
Sierra Gartersnake (Thamnophis couchi)
Black-necked Gartersnake (Thamnophis cyrtopsis)

Western Terrestrial Gartersnake (Thamnophis elegans)
Checkered Gartersnake (Thamnophis marcianus)
Northwestern Gartersnake (Thamnophis ordinoides)
Western Ribbon Snake (Thamnophis proximus) 
Plains Gartersnake (Thamnophis radix)
Narrow-headed Gartersnake (Thamnophis rufipunctatus)
Eastern Ribbon Snake (Thamnophis sauritus)
Common Gartersnake (Thamnophis sirtalis) photos added 08/18/17
Smooth Earth Snake (Virginia valeriae)



Lamprophiidae (Old World Snakes)
Cape Wolf Snake (Lycophidion capense)  



Psammophidae (African Rear-fanged Snakes)
Striped Skaapsteker (Psammophylax tritaeniatus)  



Dipsadidae (Slender Rear-fanged Snakes)
Eastern Worm Snake (Carphophis amoenus)
Ring-necked Snake (Diadophis punctatus) photos added 08/18/17
Night Snake (Hypsiglena torquata)



Xenodontidae (Robust Rear-fanged Snakes)
Western Hognose Snake (Heterodon nasicus)
Eastern Hognose Snake (Heterodon platyrhinos)