California
Snakes in Fresno County
24 species have been documented here, 3 of them venomous.
Venomous snakes in Fresno County
Full guide & what to do if bitten →
Western RattlesnakeCrotalus oreganusVenomousHeavy 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.
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Fresno County
Gopher Snake
Pituophis catenifer
Harmless
Western Rattlesnake
Crotalus oreganus
Venomous
Sierra Garter Snake
Thamnophis couchii
Harmless
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Northern Rubber Boa
Charina bottae
Harmless
California King Snake
Lampropeltis californiae
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Glossy Snake
Arizona elegans
Harmless
California Mountain Kingsnake
Lampropeltis zonata
Harmless
Eastern Kingsnake
Lampropeltis getula
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Striped Racer
Masticophis lateralis
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Long-nosed Snake
Rhinocheilus lecontei
Harmless
Common Sharp-tailed Snake
Contia tenuis
Harmless
North American Racer
Coluber constrictor
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
Coast Night Snake
Hypsiglena ochrorhynchus
Harmless
Giant Garter Snake
Thamnophis gigas
Harmless
Two-striped Garter Snake
Thamnophis hammondii
Harmless
Pine Snake
Pituophis melanoleucus
Harmless
Western Glossy Snake
Arizona occidentalis
Harmless
Southwestern Blackhead Snake
Tantilla hobartsmithi
Harmless
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Fresno County: FAQ
- Are there venomous snakes in Fresno County, California?
- Yes. 3 venomous snake species have verified records in Fresno County, California, including Western Rattlesnake, Prairie Rattlesnake, Western Diamond-backed Rattlesnake. Most snakes in Fresno County, California, however, are harmless.
- How many snake species live in Fresno County, California?
- 20+ snake species have verified records in Fresno County, California, of which 3 are venomous.
- What is the most commonly seen snake in Fresno County, California?
- The Gopher Snake is the most frequently reported snake in Fresno County, California, based on verified wildlife observations.
- What should I do if I see a venomous snake in Fresno County, California?
- 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.