Wildlife of Boulder County

Boulder County is comprised of 740 square miles of land nestled along the front range of Colorado just 30 miles northwest of Denver. Its proximity to the mountains, diverse landscapes, and various designated open spaces make the county ideal for observing local and even migrating wildlife. ...more ↓

North American Racer ¹
Coluber constrictor

Yellowbelly Racer ²
Coluber constrictor flaviventris

Lined Snake ³
Tropidoclonion lineatum

Plains Garter Snake ⁴
Thamnophis radix

Western Terrestrial Garter Snake ⁵
Thamnophis elegans

Wandering Garter Snake ⁶
Thamnophis elegans vagrans

Gopher Snake ⁵
Pituophis catenifer

Northern Watersnake ⁷
Nerodia sipedon

Northern Water Snake ⁸
Nerodia sipedon sipedon

Central Plains Milksnake
Lampropeltis triangulum gentilis

Western Hog-nosed Snake ⁹
Heterodon nasicus

Eastern Fence Lizard ¹⁰
Sceloporus undulatus

Greater Short-horned Lizard ¹¹
Phrynosoma hernandesi

Western Earless Lizard ¹²
Holbrookia maculata

Many-lined Skink
Plestiodon multivirgatus

Edited by srupinsky, Melanie Hill, Deborah H Price, and Dave Sutherland, some rights reserved (CC BY-SA)

Photo Credits

1. (c) Alan Wolf, some rights reserved (CC BY-NC-ND), uploaded by Alan Wolf
2. (c) Diana-Terry Hibbitts, some rights reserved (CC BY-NC), uploaded by Diana-Terry Hibbitts
3. (c) Mike Keeling, some rights reserved (CC BY-ND)
4. (c) Jeff Skrentny, some rights reserved (CC BY-NC), uploaded by Jeff Skrentny
5. (c) J. N. Stuart, some rights reserved (CC BY-NC-ND)
6. no rights reserved
7. (c) Douglas Mills, some rights reserved (CC BY-NC-ND)
8. (c) mrdorkesq, some rights reserved (CC BY-SA)
9. (c) Psyon, some rights reserved (CC BY-SA)
10. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
11. (c) Bill Lupardus, some rights reserved (CC BY-NC), uploaded by Bill Lupardus
12. (c) David Bygott, some rights reserved (CC BY-NC)

Wildlife of Boulder County

North American Racer 1 Coluber constrictor

Yellowbelly Racer 2 Coluber constrictor flaviventris

Lined Snake 3 Tropidoclonion lineatum

Plains Garter Snake 4 Thamnophis radix

Western Terrestrial Garter Snake 5 Thamnophis elegans

Wandering Garter Snake 6 Thamnophis elegans vagrans

Gopher Snake 5 Pituophis catenifer

Northern Watersnake 7 Nerodia sipedon

Northern Water Snake 8 Nerodia sipedon sipedon

Central Plains Milksnake Lampropeltis triangulum gentilis

Western Hog-nosed Snake 9 Heterodon nasicus

Eastern Fence Lizard 10 Sceloporus undulatus

Greater Short-horned Lizard 11 Phrynosoma hernandesi

Western Earless Lizard 12 Holbrookia maculata

Many-lined Skink Plestiodon multivirgatus