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.
[edit] Non-Venomous Snakes
- 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)
- Racer: Common
- E. Yellow Bellied Racer - Coluber constrictor flaviventris (E. CO)
- W. Yellow Bellied Racer - Coluber c. mormon (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)
- Great Plains Rat Snake Common
- Pantherophis g. emoryi
- Pantherophis g. intermontana(Valid subspecies?)
- 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)
- Watersnake: Secure
- Northern Watersnake - Nerodia s. sipedon (N.E. to S.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 of yet.)
[edit] Venomous Snakes
- Prairie Rattlesnake: Common (Crotalus viridis viridis) western 2/3 of the state.
- Midget Faded Rattlesnake: Secure (Crotalus oreganus concolor) West of the continental divide.
- Massasauga: Secure
- Western Massasauga (Integrade between S.c. edwardsii and S.c.tergeminus)
- Western Diamondback Rattlesnake: Unknown (Crotalus atrox), Southeast Colorado.
