California
Snakes in Colusa County
12 species have been documented here, 1 of them venomous.
Venomous snakes in Colusa 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.
Every snake recorded in Colusa County

Gopher Snake
Pituophis catenifer
Harmless

Western Rattlesnake
Crotalus oreganus
Venomous

Aquatic Garter Snake
Thamnophis atratus
Harmless

Common Garter Snake
Thamnophis sirtalis
Harmless

California King Snake
Lampropeltis californiae
Harmless

Giant Garter Snake
Thamnophis gigas
Harmless

North American Racer
Coluber constrictor
Harmless

Striped Racer
Masticophis lateralis
Harmless

Eastern Kingsnake
Lampropeltis getula
Harmless

Western Terrestrial Garter Snake
Thamnophis elegans
Harmless

Ring-necked Snake
Diadophis punctatus
Harmless

Common Sharp-tailed Snake
Contia tenuis
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Colusa County: FAQ
- Are there venomous snakes in Colusa County, California?
- Yes. 1 venomous snake species has verified records in Colusa County, California, including Western Rattlesnake. Most snakes in Colusa County, California, however, are harmless.
- How many snake species live in Colusa County, California?
- 10+ snake species have verified records in Colusa County, California, of which 1 is venomous.
- What is the most commonly seen snake in Colusa County, California?
- The Gopher Snake is the most frequently reported snake in Colusa County, California, based on verified wildlife observations.
- What should I do if I see a venomous snake in Colusa 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.