Texas

Snakes in Harris County

36 species have been documented here, 6 of them venomous.

Venomous snakes in Harris County

Full guide & what to do if bitten →

Eastern Copperhead
Agkistrodon contortrix
Venomous
Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Northern Cottonmouth
Agkistrodon piscivorus
Venomous
Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Texas Coralsnake
Micrurus tener
Venomous
Rings of red, yellow, and black where red touches yellow; small rounded head and round pupils.
Pygmy Rattlesnake
Sistrurus miliarius
Venomous
Stout, dark-blotched body, nine large scales on the crown, and a small rattle.
Eastern Coralsnake
Micrurus fulvius
Venomous
Rings of red, yellow, and black where red touches yellow; small rounded head and round pupils.
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 Harris County

Plain-bellied Watersnake

Nerodia erythrogaster

Diamondback Watersnake

Nerodia rhombifer

Harmless

Western Ratsnake

Pantherophis obsoletus

Harmless

Eastern Copperhead

Agkistrodon contortrix

Venomous

Northern Cottonmouth

Agkistrodon piscivorus

Eastern Hognose Snake

Heterodon platirhinos

Masticophis flagellum

Indotyphlops braminus

Harmless

Graham's Crawfish Snake

Regina grahamii

Harmless

Mississippi Green Watersnake

Nerodia cyclopion

Harmless

Prairie Kingsnake

Lampropeltis calligaster

Lampropeltis holbrooki

Lampropeltis gentilis

Pantherophis guttatus

Lampropeltis triangulum

Harmless

Checkered Garter Snake

Compiled from verified GBIF & iNaturalist observations. Informational only.

Nearby counties

Brewster County Val Verde County Bexar County Jeff Davis County Terrell County Crockett County Travis County McCulloch County Pecos County Presidio County Tom Green County Palo Pinto County