Iowa
Snakes in Decatur County
3 species have been documented here, and none are venomous.
Every snake recorded in Decatur County

Common Watersnake
Nerodia sipedon
Harmless

DeKay's Brownsnake
Storeria dekayi
Harmless

Ring-necked Snake
Diadophis punctatus
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Decatur County: FAQ
- Are there venomous snakes in Decatur County, Iowa?
- No venomous snakes have verified records in Decatur County, Iowa. Every snake recorded here is harmless to humans, though any snake may bite defensively if handled.
- How many snake species live in Decatur County, Iowa?
- 3 snake species have verified records in Decatur County, Iowa.
- What is the most commonly seen snake in Decatur County, Iowa?
- The Common Watersnake is the most frequently reported snake in Decatur County, Iowa, based on verified wildlife observations.