Texas
Snakes in Trinity County
18 species have been documented here, 5 of them venomous.
Venomous snakes in Trinity County
Full guide & what to do if bitten →
Northern CottonmouthAgkistrodon piscivorusVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Eastern CopperheadAgkistrodon contortrixVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Timber RattlesnakeCrotalus horridusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Texas CoralsnakeMicrurus tenerVenomousRings of red, yellow, and black where red touches yellow; small rounded head and round pupils.
Pygmy RattlesnakeSistrurus miliariusVenomousStout, dark-blotched body, nine large scales on the crown, and a small rattle.
Every snake recorded in Trinity County
Northern Cottonmouth
Agkistrodon piscivorus
Venomous
Western Ratsnake
Pantherophis obsoletus
Harmless
Eastern Copperhead
Agkistrodon contortrix
Venomous
Western Ribbon Snake
Thamnophis proximus
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Banded Watersnake
Nerodia fasciata
Harmless
Diamondback Watersnake
Nerodia rhombifer
Harmless
Eastern Hognose Snake
Heterodon platirhinos
Harmless
North American Racer
Coluber constrictor
Harmless
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Timber Rattlesnake
Crotalus horridus
Venomous
Speckled Kingsnake
Lampropeltis holbrooki
Harmless
Texas Coralsnake
Micrurus tener
Venomous
Pygmy Rattlesnake
Sistrurus miliarius
Venomous
Great Plains Ratsnake
Pantherophis emoryi
Harmless
Rough Greensnake
Opheodrys aestivus
Harmless
Glossy Swampsnake
Liodytes rigida
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Trinity County: FAQ
- Are there venomous snakes in Trinity County, Texas?
- Yes. 5 venomous snake species have verified records in Trinity County, Texas, including Northern Cottonmouth, Eastern Copperhead, Timber Rattlesnake, Texas Coralsnake. Most snakes in Trinity County, Texas, however, are harmless.
- How many snake species live in Trinity County, Texas?
- 10+ snake species have verified records in Trinity County, Texas, of which 5 are venomous.
- What is the most commonly seen snake in Trinity County, Texas?
- The Northern Cottonmouth is the most frequently reported snake in Trinity County, Texas, based on verified wildlife observations.
- What should I do if I see a venomous snake in Trinity County, Texas?
- 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.