Illinois
Snakes in Cass County
4 species have been documented here, and none are venomous.
Every snake recorded in Cass County
Common Garter Snake
Thamnophis sirtalis
Harmless
Gopher Snake
Pituophis catenifer
Harmless
North American Racer
Coluber constrictor
Harmless
Diamondback Watersnake
Nerodia rhombifer
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Cass County: FAQ
- Are there venomous snakes in Cass County, Illinois?
- No venomous snakes have verified records in Cass County, Illinois. Every snake recorded here is harmless to humans, though any snake may bite defensively if handled.
- How many snake species live in Cass County, Illinois?
- 4 snake species have verified records in Cass County, Illinois.
- What is the most commonly seen snake in Cass County, Illinois?
- The Common Garter Snake is the most frequently reported snake in Cass County, Illinois, based on verified wildlife observations.