Snakes in Arizona

At a glance

21 of the 63 snakes on Learn2ID live in Arizona, part of the Mountain West. 12 are venomous: Arizona Black Rattlesnake, Black-tailed Rattlesnake, Mohave Rattlesnake, Prairie Rattlesnake, Rock Rattlesnake, Sidewinder, Sonoran Coralsnake, Southwestern Speckled Rattlesnake, Tiger Rattlesnake, Western Diamondback Rattlesnake, Western Massasauga and Western Rattlesnake. Ring-necked Snake and Terrestrial Gartersnake have only a mild venom. The biggest group here is rattlesnakes: 11 of the 21. Arizona is the only state where the Tiger Rattlesnake is found. The Arizona Black Rattlesnake is found in only 2 states, and Arizona is one of them. The Rosy Boa is found in only 2 states, and Arizona is one of them. 21 look-alike pairs here involve a venomous snake — see “Commonly confused” below.