Colubridae (Harmless Egg-laying Snakes)
Eastern Glosssy Snake (Arizona elegans)
Trans-Pecos Ratsnake (Bogertophis subocularis) photos added 07/21/23
Scarlet Snake (Cemophora coccinea)
Racer (Coluber constrictor)  photos added 07/21/23
Indigo Snake (Drymarchon melanurus) photos added 07/21/23
Speckled Racer (Drymobius margaritiferus)
Chihuahuan Hooknose (Gyalopion canum)
Gray-banded Kingsnake (Lampropeltis alterna)
Mole Kingsnake (Lampropeltis calligaster)
Common Kingsnake (Lampropeltis getula)  photos added 07/21/23
Durango Mountain Kingsnake (Lampropeltis [mexicana] greeri)  
Variable Kingsnake (Lampropeltis [mexicana] leonis)  
Sonoran Mountain Kingsnake (Lampropeltis pyromelana)
Milksnake (Lampropeltis triangulum) photos added 07/21/23
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) photos added 07/21/23
Great Plains Ratsnake (Pantherophis emoryi) photos added 07/21/23
Cornsnake (Pantherophis guttatus)
Ratsnake (Pantherophis obsoletus) photos added 07/21/23
Fox Snake (Pantherophis vulpinus)  photos added 07/21/23
Gopher/Bullsnake (Pituophis catenifer) photos added 07/21/23
Longnose Snake (Rhinocheilus lecontei) photos added 07/21/23
Big Bend Patchnose Snake (Salvadora deserticola)  
Graham's Patchnose Snake (Salvadora grahamiae) photos added 07/21/23
Texas Patchnose Snake (Salvadora lineata) photos added 07/21/23
Green Ratsnake (Senticolis triaspis)
Western Shovel-nosed Snake (Sonora [Chionactis] occipitalis)
Ground Snake (Sonora semiannulata)
Banded Sand Snake (Sonora [Chilomeniscus] straminea)
Big Bend Blackheaded Snake (Tantilla cucullata)
Flatheaded Snake (Tantilla gracilis)
Southwestern Blackheaded Snake (Tantilla hobartsmithi)
Plains Blackheaded Snake (Tantilla nigriceps) photos added 07/21/23



Natricidae (Harmless Live-bearing Snakes)
Saltmarsh Snake (Nerodia clarki)
Plain-bellied Watersnake (Nerodia erythrogaster)  
Banded Watersnake (Nerodia fasciata)   photos added 07/21/23
Florida Green Watersnake (Nerodia floridana)
Northern Watersnake (Nerodia sipedon)
Diamondbacked Watersnake (Nerodia rhombifer)   photos added 07/21/23
Glossy Crayfish Snake (Regina rigida)
Queen Snake (Regina septemvittata)
Black Swamp Snake (Seminatrix pygea)
Brown Snake (Storeria dekayi)
Red-bellied Snake (Storeria occipitomaculata)
Aquatic Gartersnake (Thamnophis atratus)
Sierra Gartersnake (Thamnophis couchi)
Black-necked Gartersnake (Thamnophis cyrtopsis) photos added 07/21/23
Western Terrestrial Gartersnake (Thamnophis elegans) photos added 07/21/23
Checkered Gartersnake (Thamnophis marcianus) photos added 07/21/23
Northwestern Gartersnake (Thamnophis ordinoides)
Western Ribbon Snake (Thamnophis proximus)
Plains Gartersnake (Thamnophis radix)
Narrow-headed Gartersnake (Thamnophis rufipunctatus)
Eastern Ribbon Snake (Thamnophis sauritus) photos added 07/21/23
Common Gartersnake (Thamnophis sirtalis) photos added 07/21/23
Lined Snake (Tropidoclonion lineatum)
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)