Snakes in Collin County

• 
  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.

• 
  Broad-banded Copperhead

  Agkistrodon laticinctus

  ▲ Venomous

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

• 
  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 Collin County

Plain-bellied Watersnake

Nerodia erythrogaster

Harmless

Western Ratsnake

Pantherophis obsoletus

Harmless

Eastern Copperhead

Agkistrodon contortrix

▲ Venomous

Diamondback Watersnake

Nerodia rhombifer

Harmless

Rough Earthsnake

Virginia striatula

Harmless

Rough Greensnake

Opheodrys aestivus

Harmless

DeKay's Brownsnake

Storeria dekayi

Harmless

North American Racer

Coluber constrictor

Harmless

Northern Cottonmouth

Agkistrodon piscivorus

▲ Venomous

Common Garter Snake

Thamnophis sirtalis

Harmless

Broad-banded Copperhead

Agkistrodon laticinctus

▲ Venomous

Western Ribbon Snake

Thamnophis proximus

Harmless

Ring-necked Snake

Diadophis punctatus

Harmless

Great Plains Ratsnake

Pantherophis emoryi

Harmless

Lined Snake

Tropidoclonion lineatum

Harmless

Speckled Kingsnake

Lampropeltis holbrooki

Harmless

Common Coachwhip

Masticophis flagellum

Harmless

Prairie Kingsnake

Lampropeltis calligaster

Harmless

Banded Watersnake

Nerodia fasciata

Harmless

Common Watersnake

Nerodia sipedon

Harmless

Gopher Snake

Pituophis catenifer

Harmless

Timber Rattlesnake

Crotalus horridus

▲ Venomous

Checkered Garter Snake

Thamnophis marcianus

Harmless

Flat-headed Snake

Tantilla gracilis

Harmless

Graham's Crawfish Snake

Regina grahamii

Harmless

Compiled from verified GBIF & iNaturalist observations. Informational only.

Snakes in Collin County: FAQ

Are there venomous snakes in Collin County, Texas?

Yes. 4 venomous snake species have verified records in Collin County, Texas, including Eastern Copperhead, Northern Cottonmouth, Broad-banded Copperhead, Timber Rattlesnake. Most snakes in Collin County, Texas, however, are harmless.

How many snake species live in Collin County, Texas?

20+ snake species have verified records in Collin County, Texas, of which 4 are venomous.

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

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

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

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