Snakes in Llano 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.

• 
  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.

• 
  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.

• 
  Eastern Black-tailed Rattlesnake

  Crotalus ornatus

  ▲ Venomous

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

Every snake recorded in Llano County

Plain-bellied Watersnake

Nerodia erythrogaster

Harmless

Western Ribbon Snake

Thamnophis proximus

Harmless

Western Diamond-backed Rattlesnake

Crotalus atrox

▲ Venomous

Diamondback Watersnake

Nerodia rhombifer

Harmless

Western Ratsnake

Pantherophis obsoletus

Harmless

Common Coachwhip

Masticophis flagellum

Harmless

Checkered Garter Snake

Thamnophis marcianus

Harmless

Striped Whipsnake

Masticophis taeniatus

Harmless

Gopher Snake

Pituophis catenifer

Harmless

Texas Patch-nosed Snake

Salvadora lineata

Harmless

Black-necked Garter Snake

Thamnophis cyrtopsis

Harmless

Northern Cottonmouth

Agkistrodon piscivorus

▲ Venomous

Long-nosed Snake

Rhinocheilus lecontei

Harmless

Texas Blind Snake

Rena dulcis

Harmless

Flat-headed Snake

Tantilla gracilis

Harmless

Rough Earthsnake

Virginia striatula

Harmless

Texas Coralsnake

Micrurus tener

▲ Venomous

Glossy Snake

Arizona elegans

Harmless

DeKay's Brownsnake

Storeria dekayi

Harmless

Broad-banded Copperhead

Agkistrodon laticinctus

▲ Venomous

Ground Snake

Sonora semiannulata

Harmless

Eastern Copperhead

Agkistrodon contortrix

▲ Venomous

Rough Greensnake

Opheodrys aestivus

Harmless

Great Plains Ratsnake

Pantherophis emoryi

Harmless

Eastern Hognose Snake

Heterodon platirhinos

Harmless

Great Plains Ground Snake

Sonora episcopa

Harmless

Eastern Black-tailed Rattlesnake

Crotalus ornatus

▲ Venomous

Pine Snake

Pituophis melanoleucus

Harmless

Compiled from verified GBIF & iNaturalist observations. Informational only.

Snakes in Llano County: FAQ

Are there venomous snakes in Llano County, Texas?

Yes. 6 venomous snake species have verified records in Llano County, Texas, including Western Diamond-backed Rattlesnake, Northern Cottonmouth, Texas Coralsnake, Broad-banded Copperhead. Most snakes in Llano County, Texas, however, are harmless.

How many snake species live in Llano County, Texas?

20+ snake species have verified records in Llano County, Texas, of which 6 are venomous.

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

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

What should I do if I see a venomous snake in Llano 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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