Snakes
Non-venomous
- Arizona mountain kingsnake (Lampropeltis pyromelana)
- Banded sand snake (Sonora cincta)
- Big Bend patch-nosed snake (Salvadora deserticola)
- Blackneck garter snake (Thamnophis cyrtopsis)
- California kingsnake (Lampropeltis californiae)
- Checkered garter snake (Thamnophis marcianus)
- Chihuahuan black-headed snake (Tantilla wilcoxi)
- Chihuahuan hook-nosed snake (Gyalopion canum)
- Chihuahuan mountain kingsnake (Lampropeltis knoblochi)
- Chihuahuan nightsnake (Hypsiglena jani)
- Coachwhip (Masticophis flagellum)
- Coastal rosy boa (Lichanura orcutti)
- Colorado Desert shovelnose snake (Sonora annulata)
Note: Often lacks red bands - Desert kingsnake (Lampropeltis splendida)
- Desert nightsnake (Hypsiglena chlorophaea)
- Desert rosy boa (Lichanura trivirgata)
- Eastern patch-nosed snake (Salvadora grahamiae)
- Glossy snake (Arizona elegans)
- Green rat snake (Senticolis triaspis)
- Mexican garter snake (Thamnophis eques)
- Mexican hognose snake (Heterodon kennerlyi)
- Narrowhead garter snake (Thamnophis rufipunctatus)
- Plains black-headed snake (Tantilla nigriceps)
- Saddled leafnose snake (Phyllorhynchus browni)
- Sonoran gopher snake (Pituophis catenifer affinis)
- Sonoran lyre snake (Trimorphodon lambda)
- Sonoran whipsnake (Masticophis bilineatus)
- Southwestern blackhead snake (Tantilla hobartsmithi)
- Spotted leafnose snake (Phyllorhynchus decurtatus)
- Striped whipsnake (Masticophis taeniatus)
- Long-nosed snake (Rhinocheilus lecontei)
Note: Often only black and white. - Western ground snake (Sonora semiannulata)
Note: Extremely variable appearance - Western hognose snake (Heterodon nasicus)
- Western milk snake (Lampropeltis gentilis)
- Western patch-nosed snake (Salvadora hexilepis)
- Western shovelnose snake (Sonora occipitalis)
- Western terrestrial Garter snake (Thamnophis elegans)
- Western threadsnake (Rena humilis)
- Texas threadsnake (Rena dulcis)
- Thornscrub hook-nosed snake (Gyalopion quadrangulare)
- Thornscrub vine snake (Oxybelis microphthalmus)
- Regal ringneck snake (Diadophis punctatus regalis)
Note: This subspecies often lacks ringneck - Yaqui black-headed snake (Tantilla yaquia)
Venomous
- Arizona black rattlesnake (Crotalus cerberus)
- Arizona ridge-nosed rattlesnake (Crotalus willardi willardi)
- Blacktail rattlesnake (Crotalus molossus)
- Grand Canyon rattlesnake (Crotalus oreganus abyssus)
- Great Basin rattlesnake (Crotalus lutosus)
- Hopi rattlesnake (Crotalus viridis nuntius)
- Mojave rattlesnake (Crotalus scutulatus)
- Rock rattlesnake (Crotalus lepidus)
- Sidewinder rattlesnake (Crotalus cerastes)
- Sonoran coral snake (Micruroides euryxanthus)
- Speckled rattlesnake (Crotalus pyrrhus)
Note: Coloration varies between populations - Tiger rattlesnake (Crotalus tigris)
- Twin-spotted rattlesnake (Crotalus pricei)
- Western diamondback rattlesnake (Crotalus atrox)
- Western massasauga (Sistrurus tergeminus)
