Texas
Snakes in Castro County
6 species have been documented here, 1 of them venomous.
Venomous snakes in Castro 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 Castro County

Checkered Garter Snake
Thamnophis marcianus
Harmless

Prairie Rattlesnake
Crotalus viridis
Venomous

Pine Snake
Pituophis melanoleucus
Harmless

Gopher Snake
Pituophis catenifer
Harmless

Speckled Kingsnake
Lampropeltis holbrooki
Harmless

Plains Hognose Snake
Heterodon nasicus
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Castro County: FAQ
- Are there venomous snakes in Castro County, Texas?
- Yes. 1 venomous snake species has verified records in Castro County, Texas, including Prairie Rattlesnake. Most snakes in Castro County, Texas, however, are harmless.
- How many snake species live in Castro County, Texas?
- 6 snake species have verified records in Castro County, Texas, of which 1 is venomous.
- What is the most commonly seen snake in Castro County, Texas?
- The Checkered Garter Snake is the most frequently reported snake in Castro County, Texas, based on verified wildlife observations.
- What should I do if I see a venomous snake in Castro 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.