Know the dangerous ones

Venomous snakes in Pima County, Arizona

13 venomous snake species have verified records in Pima County. Learn to recognize each one, and know what to do if you are bitten.

Field entries

Crotalus atrox
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Commonly seenFull profile →
Crotalus molossus
Western Black-tailed Rattlesnake
Crotalus molossus
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Commonly seenFull profile →
Crotalus tigris
Tiger Rattlesnake
Crotalus tigris
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Commonly seenFull profile →
Crotalus scutulatus
Mojave Rattlesnake
Crotalus scutulatus
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Commonly seenFull profile →
Crotalus cerastes
Sidewinder
Crotalus cerastes
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Commonly seenFull profile →
Micruroides euryxanthus
Sonoran Coralsnake
Micruroides euryxanthus
Venomous
How to identify
Red, yellow (whitish), and black rings with red touching yellow; blunt black snout.
Commonly seenFull profile →
Crotalus cerberus
Arizona Black Rattlesnake
Crotalus cerberus
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Often seenFull profile →
Crotalus willardi
Ridge-nosed Rattlesnake
Crotalus willardi
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Occasionally seenFull profile →
Crotalus lepidus
Rock Rattlesnake
Crotalus lepidus
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Occasionally seenFull profile →
Crotalus pricei
Twin-spotted Rattlesnake
Crotalus pricei
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Rarely seenFull profile →
Crotalus mitchellii
Speckled Rattlesnake
Crotalus mitchellii
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Rarely seenFull profile →
Crotalus viridis
Prairie Rattlesnake
Crotalus viridis
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Rarely seenFull profile →
Crotalus pyrrhus
Southwestern Speckled Rattlesnake
Crotalus pyrrhus
Venomous
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Rarely seenFull profile →

Looking for all snakes here, not just the venomous ones? See all snakes in Pima County.