Arizona
Snakes in Pima County
48 species have been documented here, 12 of them venomous.
Venomous snakes in Pima County
Full guide & what to do if bitten →
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Western Black-tailed RattlesnakeCrotalus molossusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Tiger RattlesnakeCrotalus tigrisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Mojave RattlesnakeCrotalus scutulatusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
SidewinderCrotalus cerastesVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Sonoran CoralsnakeMicruroides euryxanthusVenomousRed, yellow (whitish), and black rings with red touching yellow; blunt black snout.
Arizona Black RattlesnakeCrotalus cerberusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Ridge-nosed RattlesnakeCrotalus willardiVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Rock RattlesnakeCrotalus lepidusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Twin-spotted RattlesnakeCrotalus priceiVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Speckled RattlesnakeCrotalus mitchelliiVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Pima County
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Pima County: FAQ
- Are there venomous snakes in Pima County, Arizona?
- Yes. 12 venomous snake species have verified records in Pima County, Arizona, including Western Diamond-backed Rattlesnake, Western Black-tailed Rattlesnake, Tiger Rattlesnake, Mojave Rattlesnake. Most snakes in Pima County, Arizona, however, are harmless.
- How many snake species live in Pima County, Arizona?
- 40+ snake species have verified records in Pima County, Arizona, of which 12 are venomous.
- What is the most commonly seen snake in Pima County, Arizona?
- The Western Diamond-backed Rattlesnake is the most frequently reported snake in Pima County, Arizona, based on verified wildlife observations.
- What should I do if I see a venomous snake in Pima County, Arizona?
- Keep your distance and do not try to catch or kill it. Most bites happen when people handle or corner a snake. If someone is bitten, contact local emergency services or poison control immediately.