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Typhlopidae (Blindsnakes)



Leptotyphlopidae (Threadsnakes)
New Mexico Threadsnake (Rena dissecta)
Plains Threadsnake (Rena dulcis)

Western Threadsnake (Rena 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)
Cottonmouth (Agkistrodon piscivorus)
Eastern Diamondbacked Rattlesnake (Crotalus adamanteus)
Western Diamondbacked Rattlesnake (Crotalus atrox) photos added 01/04/19
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)  
Indigo Snake (Drymarchon melanurus)
Speckled Racer (Drymobius margaritiferus)
Chihuahuan Hooknose (Gyalopion canum)
Gray-banded Kingsnake (Lampropeltis alterna)
photos added 01/04/19
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)
Brown Vine Snake (Oxybelis aeneus)
Baird's Ratsnake (Pantherophis bairdi)
Cornsnake (Pantherophis guttatus)  
Ratsnake (Pantherophis obsoletus)
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)
Ground Snake (Sonora semiannulata)
Banded Sand Snake (Sonora [Chilomeniscus] straminea) NEW! photos added 01/04/19
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)  
Northern Watersnake (Nerodia sipedon)

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)
Rough Earth Snake (Virginia striatula)
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)
Night Snake (Hypsiglena torquata)



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