South Dakota
Snakes in Shannon County
5 species have been documented here, 1 of them venomous.
Venomous snakes in Shannon County
Full guide & what to do if bitten →
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Shannon County
Gopher Snake
Pituophis catenifer
Harmless
Plains Garter Snake
Thamnophis radix
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Common Garter Snake
Thamnophis sirtalis
Harmless
North American Racer
Coluber constrictor
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Shannon County: FAQ
- Are there venomous snakes in Shannon County, South Dakota?
- Yes. 1 venomous snake species has verified records in Shannon County, South Dakota, including Prairie Rattlesnake. Most snakes in Shannon County, South Dakota, however, are harmless.
- How many snake species live in Shannon County, South Dakota?
- 5 snake species have verified records in Shannon County, South Dakota, of which 1 is venomous.
- What is the most commonly seen snake in Shannon County, South Dakota?
- The Gopher Snake is the most frequently reported snake in Shannon County, South Dakota, based on verified wildlife observations.
- What should I do if I see a venomous snake in Shannon County, South Dakota?
- 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.