Snakes in Custer County

• 
  Prairie Rattlesnake

  Crotalus viridis

  ▲ Venomous

  Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.

• 
  Western Rattlesnake

  Crotalus oreganus

  ▲ Venomous

  Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.

Every snake recorded in Custer County

Western Terrestrial Garter Snake

Thamnophis elegans

Harmless

Prairie Rattlesnake

Crotalus viridis

▲ Venomous

Northern Rubber Boa

Charina bottae

Harmless

Gopher Snake

Pituophis catenifer

Harmless

Western Rattlesnake

Crotalus oreganus

▲ Venomous

Compiled from verified GBIF & iNaturalist observations. Informational only.

Snakes in Custer County: FAQ

Are there venomous snakes in Custer County, Idaho?

Yes. 2 venomous snake species have verified records in Custer County, Idaho, including Prairie Rattlesnake, Western Rattlesnake. Most snakes in Custer County, Idaho, however, are harmless.

How many snake species live in Custer County, Idaho?

5 snake species have verified records in Custer County, Idaho, of which 2 are venomous.

What is the most commonly seen snake in Custer County, Idaho?

The Western Terrestrial Garter Snake is the most frequently reported snake in Custer County, Idaho, based on verified wildlife observations.

What should I do if I see a venomous snake in Custer County, Idaho?

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.

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