Snakes in Williamson County

• 
  Western Diamond-backed Rattlesnake

  Crotalus atrox

  ▲ Venomous

  Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.

• 
  Texas Coralsnake

  Micrurus tener

  ▲ Venomous

  Rings of red, yellow, and black where red touches yellow; small rounded head and round pupils.

• 
  Northern Cottonmouth

  Agkistrodon piscivorus

  ▲ Venomous

  Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.

• 
  Broad-banded Copperhead

  Agkistrodon laticinctus

  ▲ Venomous

  Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.

• 
  Eastern Copperhead

  Agkistrodon contortrix

  ▲ Venomous

  Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.

Every snake recorded in Williamson County

Plain-bellied Watersnake

Nerodia erythrogaster

Harmless

Western Ratsnake

Pantherophis obsoletus

Harmless

Western Diamond-backed Rattlesnake

Crotalus atrox

▲ Venomous

Western Ribbon Snake

Thamnophis proximus

Harmless

Rough Earthsnake

Virginia striatula

Harmless

Diamondback Watersnake

Nerodia rhombifer

Harmless

Rough Greensnake

Opheodrys aestivus

Harmless

DeKay's Brownsnake

Storeria dekayi

Harmless

Common Coachwhip

Masticophis flagellum

Harmless

Texas Blind Snake

Rena dulcis

Harmless

Texas Coralsnake

Micrurus tener

▲ Venomous

North American Racer

Coluber constrictor

Harmless

Black-necked Garter Snake

Thamnophis cyrtopsis

Harmless

Texas Patch-nosed Snake

Salvadora lineata

Harmless

Eastern Hognose Snake

Heterodon platirhinos

Harmless

Northern Cottonmouth

Agkistrodon piscivorus

▲ Venomous

Checkered Garter Snake

Thamnophis marcianus

Harmless

Broad-banded Copperhead

Agkistrodon laticinctus

▲ Venomous

Great Plains Ratsnake

Pantherophis emoryi

Harmless

Prairie Kingsnake

Lampropeltis calligaster

Harmless

Speckled Kingsnake

Lampropeltis holbrooki

Harmless

Gopher Snake

Pituophis catenifer

Harmless

Flat-headed Snake

Tantilla gracilis

Harmless

Great Plains Ground Snake

Sonora episcopa

Harmless

Glossy Snake

Arizona elegans

Harmless

Ring-necked Snake

Diadophis punctatus

Harmless

Eastern Copperhead

Agkistrodon contortrix

▲ Venomous

Lined Snake

Tropidoclonion lineatum

Harmless

Eastern Kingsnake

Lampropeltis getula

Harmless

Compiled from verified GBIF & iNaturalist observations. Informational only.

Snakes in Williamson County: FAQ

Are there venomous snakes in Williamson County, Texas?

Yes. 5 venomous snake species have verified records in Williamson County, Texas, including Western Diamond-backed Rattlesnake, Texas Coralsnake, Northern Cottonmouth, Broad-banded Copperhead. Most snakes in Williamson County, Texas, however, are harmless.

How many snake species live in Williamson County, Texas?

20+ snake species have verified records in Williamson County, Texas, of which 5 are venomous.

What is the most commonly seen snake in Williamson County, Texas?

The Plain-bellied Watersnake is the most frequently reported snake in Williamson County, Texas, based on verified wildlife observations.

What should I do if I see a venomous snake in Williamson 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.

Nearby counties