Order: Squamata - Snakes
Colorado Snake Species List: *Species listed in orange have completed accounts.
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Family: Colubridae
Genus: Coluber - North American Racers, Coachwhips, & Whipsnakes
North American Racer
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Genus: Heterodon - North American Hog-nosed Snakes
Plains Hog-nosed Snake
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Eastern Hog-nosed Snake
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Genus: Pantherophis - North American Ratsnakes
Great Plains Ratsnake
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Photo: Aaron Balogh
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Genus: Thamnophis - Gartersnakes
Terrestrial Gartersnake
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Common Gartersnake
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Western Ribbonsnake
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Black-necked Gartersnake
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Plains Gartersnake
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Genus: Tropidoclonion - Lined SnakesLined Snake
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Genus: Nerodia - North American WatersnakesCommon Watersnake
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Genus: Arizona - Glossy SnakeGlossy Snake
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Glossy Snake on road. Photo: Kevin Urbanek.
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Genus: Rhinocheilus - Long-nosed SnakesLong-nosed Snake
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Photo: Tim Warfel.
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Genus: Opheodrys - GreensnakesSmooth Greensnake
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Photo: Tim Warfel.
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Genus: Diadophis - Ring-necked SnakesRing-necked Snake
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Photo: Aaron Balogh
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Genus: Tantilla - Black-headed, Crowned, & Flat-headed Snakes
Genus: Pituophis - Bullsnakes, Pinesnakes & Gophersnakes
Gophersnake (Bullsnake)
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Genus: Lampropeltis - Kingsnakes
Speckled Kingsnake
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California Kingsnake
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Milksnake
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Genus: Hypsiglena - North American Nightsnakes
Family: Leptotyphlopidae
Family: Viperidae
Genus: Crotalus - Rattlesnakes
Prairie Rattlesnake *Venomous
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Western Rattlesnake
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Family: Boidae
Genus: Charina - Rubber Boas
Rubber Boa *Possible occurrence in Colorado
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