List of snakes of Colorado

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This is a list of the known venomous and non-venomous snakes in Colorado, United States.

Non-venomous snakes[edit]

  • Blind Snake: Rare
    • (Texas)New Mexican Blind Snake - Leptotyphlops d. dissectus (S.E. CO)
  • Glossy Snake: Secure
    • Kansas Glossy Snake - Arizona e. elegans (E. CO)
    • Painted Desert Glossy Snake - Arizona e. philipi (S.W. CO)
  • Ringneck Snake: Secure
    • Prairie Ringneck Snake - Diadophis p. arnyi (S.E. CO)
    • Regal Ringneck Snake - Diadophis p. regalis (Note noted with hammerson, this could be a possible occurrence in extreme S.W. CO)


  • Western Hognose Snake: Nasicus is secure.
    • Plains Hognose Snake - Heterodon n. nasicus (E. CO)
    • E. Hognose Snake - Heterodon platirhinos (Extreme E. CO)
  • Night Snake: Secure
    • Texas Nightsnake - Hypsiglena t. janii (S.E. CO)
    • Mesa Verde Nightsnake - Hypsiglena t. loreala (W. CO)
  • Common Kingsnake: Uncommon
    • Kingsnake Intergrade - Lampropeltis g. holbrooki/splendida(Speckled/Desert) S.E. CO
    • California Kingsnake - Lampropeltis g. californiae (Extreme S.W. CO)
  • Milk Snake: Secure
    • Utah Milksnake - Lampropeltis t. taylori (West-Central CO)
    • Lampropeltis t. taylori/celaenops (Utah/New Mex) S.W. & South-Central CO
    • Lampropeltis t. multistriata/gentilis(Pale/Central Plains) N.E. CO
    • Central Plains Milksnake - Lampropeltis t. gentilis/ Rest of E. CO

Note: Could be variants instead of subspecies.

  • Green Snake: Secure
    • W. Smooth Green Snake - Liochlorophis vernalis blanchardi (Central to Western Slope)
  • Coachwhip: Common
    • W. Coachwhip - Masticophis f. testaceus (East to South-Central to Southeastern CO)
    • Red Coachwhip - Masticophis f. piceus ( This snake may occur in extreme S.W. Colorado, but there is no evidence to suggest such. The closest populations are in S.W. Utah.
  • Striped Whipsnake: Common
    • Desert Striped Whipsnake - Masticophis t. taeniatus (W. CO)
  • Bullsnake/Gophersnake: Common
    • Bullsnake - Pituophis c. sayi (Eastern Slope)
    • Great Basin Gophersnake - Pituophis c. deserticola (Western Slope)
    • Sonoran Gophersnake - Pituophis c. affinis ( Intergradation may occur with deserticola in Colorado)
  • Longnose Snake: Uncommon
    • Texas Longnose Snake - Rhinocheilus l. tessellatus (S.E. CO)

Ground Snake: Secure W. Ground Snake - Sonora semiannulata (S.E. CO) Note: This could also occur in N.W. CO.

  • Black-headed Snake: Secure
    • S.W. Black-headed Snake - Tantilla hobartsmithi (W. CO)
    • Plains Black-headed Snake - Tantilla n. nigriceps (Eastern Slope)
  • Garter Snake:
    • W. Blackneck Garter Snake - Thamnophis c. cyrtopsis (S.E. to S.W. CO) Uncommon
    • Western Terrestrial Garter Snake - Thamnophis e. vagrans (Most of Colorado) Common
    • W. Plains Garter Snake - Thamnophis r. haydenii (Eastern Slope) Common
    • Red Sided Garter Snake - Thamnophis s. parietalis (North-Central to N.E. CO) Common
  • Arid Land Ribbonsnake - Thamnophis p. diabolicus (S.E. CO) RARE!
  • Brown Snake: Rare(May be extirpated)
    • Texas Brown Snake - Storeria d. texana (This species was reportedly found in Las Animas County by Arthur E. Beardsley(1883). This species may be extirpated, but fieldherping might yield specimens.
  • Lined Snake - Tropidoclonion l. lineatum (Generally Eastern Slope) Secure
  • Rubber Boa - Charina bottae (This species may occur in Colorado, but no substantial evidence suggest such, as yet)

Venomous snakes[edit]

  • Massasauga: Secure
    • Western Massasauga (Integrade between S.c. edwardsii and S.c.tergeminus)

See also[edit]