Snakes in Runnels 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.

• 
  Eastern Massasauga

  Sistrurus catenatus

  ▲ Venomous

  Stout, dark-blotched body, nine large scales on the crown, and a small rattle.

• 
  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.

Every snake recorded in Runnels County

Brazos River Watersnake

Nerodia harteri

Harmless

Diamondback Watersnake

Nerodia rhombifer

Harmless

Western Ribbon Snake

Thamnophis proximus

Harmless

Plain-bellied Watersnake

Nerodia erythrogaster

Harmless

Concho Watersnake

Nerodia paucimaculata

Harmless

Western Diamond-backed Rattlesnake

Crotalus atrox

▲ Venomous

Western Ratsnake

Pantherophis obsoletus

Harmless

Common Coachwhip

Masticophis flagellum

Harmless

No photo

Mexican Whip Snake

Masticophis lineatus

Harmless

Gopher Snake

Pituophis catenifer

Harmless

Texas Blind Snake

Rena dulcis

Harmless

North American Racer

Coluber constrictor

Harmless

Checkered Garter Snake

Thamnophis marcianus

Harmless

Eastern Massasauga

Sistrurus catenatus

▲ Venomous

Tantilla selmae

Harmless

Great Plains Ratsnake

Pantherophis emoryi

Harmless

Desert Kingsnake

Lampropeltis splendida

Harmless

Great Plains Ground Snake

Sonora episcopa

Harmless

Plains Black-headed Snake

Tantilla nigriceps

Harmless

Sinaloan Nightsnake

Hypsiglena torquata

Harmless

Ring-necked Snake

Diadophis punctatus

Harmless

Northern Cottonmouth

Agkistrodon piscivorus

▲ Venomous

Eastern Hognose Snake

Heterodon platirhinos

Harmless

Speckled Kingsnake

Lampropeltis holbrooki

Harmless

Long-nosed Snake

Rhinocheilus lecontei

Harmless

Texas Coralsnake

Micrurus tener

▲ Venomous

Flat-headed Snake

Tantilla gracilis

Harmless

Glossy Snake

Arizona elegans

Harmless

Chihuahuan Nightsnake

Hypsiglena jani

Harmless

Plains Hognose Snake

Heterodon nasicus

Harmless

Ground Snake

Sonora semiannulata

Harmless

Graham's Crawfish Snake

Regina grahamii

Harmless

Compiled from verified GBIF & iNaturalist observations. Informational only.

Nearby counties