Snakes in Madison County

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  Timber Rattlesnake

  Crotalus horridus

  ▲ Venomous

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

Every snake recorded in Madison County

Timber Rattlesnake

Crotalus horridus

▲ Venomous

Eastern Milksnake

Lampropeltis triangulum

Harmless

Common Garter Snake

Thamnophis sirtalis

Harmless

Common Watersnake

Nerodia sipedon

Harmless

Western Ratsnake

Pantherophis obsoletus

Harmless

North American Racer

Coluber constrictor

Harmless

DeKay's Brownsnake

Storeria dekayi

Harmless

Ring-necked Snake

Diadophis punctatus

Harmless

Western Foxsnake

Pantherophis ramspotti

Harmless

Pine Snake

Pituophis melanoleucus

Harmless

Eastern Hognose Snake

Heterodon platirhinos

Harmless

Smooth Earthsnake

Virginia valeriae

Harmless

Lined Snake

Tropidoclonion lineatum

Harmless

Gopher Snake

Pituophis catenifer

Harmless

Western Worm Snake

Carphophis vermis

Harmless

Compiled from verified GBIF & iNaturalist observations. Informational only.

Snakes in Madison County: FAQ

Are there venomous snakes in Madison County, Iowa?

Yes. 1 venomous snake species has verified records in Madison County, Iowa, including Timber Rattlesnake. Most snakes in Madison County, Iowa, however, are harmless.

How many snake species live in Madison County, Iowa?

10+ snake species have verified records in Madison County, Iowa, of which 1 is venomous.

What is the most commonly seen snake in Madison County, Iowa?

The Timber Rattlesnake is the most frequently reported snake in Madison County, Iowa, based on verified wildlife observations.

What should I do if I see a venomous snake in Madison County, Iowa?

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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