Kansas
Snakes in Lyon County
21 species have been documented here, 3 of them venomous.
Venomous snakes in Lyon County
Full guide & what to do if bitten →
Eastern CopperheadAgkistrodon contortrixVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Western MassasaugaSistrurus tergeminusVenomousStout, dark-blotched body, nine large scales on the crown, and a small rattle.
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Lyon County
Ring-necked Snake
Diadophis punctatus
Harmless
North American Racer
Coluber constrictor
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Plains Garter Snake
Thamnophis radix
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
Eastern Copperhead
Agkistrodon contortrix
Venomous
Diamondback Watersnake
Nerodia rhombifer
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Lined Snake
Tropidoclonion lineatum
Harmless
Graham's Crawfish Snake
Regina grahamii
Harmless
Speckled Kingsnake
Lampropeltis holbrooki
Harmless
Western Massasauga
Sistrurus tergeminus
Venomous
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Western Ribbon Snake
Thamnophis proximus
Harmless
Gopher Snake
Pituophis catenifer
Harmless
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
Prairie Kingsnake
Lampropeltis calligaster
Harmless
Flat-headed Snake
Tantilla gracilis
Harmless
Western Worm Snake
Carphophis vermis
Harmless
Great Plains Ratsnake
Pantherophis emoryi
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Lyon County: FAQ
- Are there venomous snakes in Lyon County, Kansas?
- Yes. 3 venomous snake species have verified records in Lyon County, Kansas, including Eastern Copperhead, Western Massasauga, Western Diamond-backed Rattlesnake. Most snakes in Lyon County, Kansas, however, are harmless.
- How many snake species live in Lyon County, Kansas?
- 20+ snake species have verified records in Lyon County, Kansas, of which 3 are venomous.
- What is the most commonly seen snake in Lyon County, Kansas?
- The Ring-necked Snake is the most frequently reported snake in Lyon County, Kansas, based on verified wildlife observations.
- What should I do if I see a venomous snake in Lyon County, Kansas?
- 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.