Idaho snakes: ID chart

Prairie Rattlesnake

Crotalus viridis

Venomous

East-central Idaho and a small section near the northeastern border with Montana; especially common in the …

Western Rattlesnake

Crotalus oreganus

Venomous

Most common rattlesnake in Idaho; across southern Idaho and up along the western borders with Oregon and …

Desert Nightsnake

Hypsiglena chlorophaea

Mildly venomous

In Idaho, Night Snakes can be found in the southern portion of the state, and northward along the Snake River …

Common Gartersnake

Thamnophis sirtalis

Not stated

In Idaho, the Common Garter Snake is less common than the Western Terrestrial Garter Snake, but is generally …

Gophersnake

Pituophis catenifer

Non-venomous

In Idaho, Gopher Snakes can be found in appropriate habitat across most of the state, with the exception of …

Long-nosed Snake

Rhinocheilus lecontei

Not stated

In Idaho, Longnose Snakes can be found in the southwestern desert regions of the state.

North American Racer

Coluber constrictor

Not stated

Racers can be found across most of Idaho and are absent only from the northernmost portion of the state.

Northern Rubber Boa

Charina bottae

Not stated

In Idaho, Rubber Boas can be found in appropriate habitat across the entire state.

Ring-necked Snake

Diadophis punctatus

Not stated

In Idaho, Ringneck Snakes can be found in disjunct areas over much of the state.

Smooth Greensnake

Opheodrys vernalis

Not stated

Striped Whipsnake

Coluber taeniatus

Not stated

In Idaho, Striped Whipsnakes are restricted to the southwest and south-central portions of the state.

Terrestrial Gartersnake

Thamnophis elegans

Not stated

In Idaho, Western Terrestrial Garter Snakes can be found statewide.

Western Groundsnake

Sonora semiannulata

Not stated

In Idaho, Western Ground Snakes are restricted to the southwestern portion of the state, along the Snake …