Texas
Snakes in Johnson County
27 species have been documented here, 6 of them venomous.
Venomous snakes in Johnson County
Full guide & what to do if bitten →
Broad-banded CopperheadAgkistrodon laticinctusVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
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.
Eastern MassasaugaSistrurus catenatusVenomousStout, dark-blotched body, nine large scales on the crown, and a small rattle.
Pygmy RattlesnakeSistrurus miliariusVenomousStout, dark-blotched body, nine large scales on the crown, and a small rattle.
Every snake recorded in Johnson County
Western Ratsnake
Pantherophis obsoletus
Harmless
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Rough Earthsnake
Virginia striatula
Harmless
Western Ribbon Snake
Thamnophis proximus
Harmless
North American Racer
Coluber constrictor
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Broad-banded Copperhead
Agkistrodon laticinctus
Venomous
Rough Greensnake
Opheodrys aestivus
Harmless
Diamondback Watersnake
Nerodia rhombifer
Harmless
Gopher Snake
Pituophis catenifer
Harmless
Speckled Kingsnake
Lampropeltis holbrooki
Harmless
Great Plains Ratsnake
Pantherophis emoryi
Harmless
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
Texas Blind Snake
Rena dulcis
Harmless
Lined Snake
Tropidoclonion lineatum
Harmless
Prairie Kingsnake
Lampropeltis calligaster
Harmless
Eastern Hognose Snake
Heterodon platirhinos
Harmless
Eastern Copperhead
Agkistrodon contortrix
Venomous
Texas Patch-nosed Snake
Salvadora lineata
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Brazos River Watersnake
Nerodia harteri
Harmless
No photo
Mexican Whip Snake
Masticophis lineatus
Harmless
Western Massasauga
Sistrurus tergeminus
Venomous
Eastern Massasauga
Sistrurus catenatus
Venomous
Ring-necked Snake
Diadophis punctatus
Harmless
Pygmy Rattlesnake
Sistrurus miliarius
Venomous
Compiled from verified GBIF & iNaturalist observations. Informational only.