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 ↓

Sagebrush Vole ¹
Lemmiscus curtatus

Abert's Squirrel ²
Sciurus aberti

Fox Squirrel ³
Sciurus niger

Yellow-bellied Marmot ⁴
Marmota flaviventris

White-tailed Prairie Dog ⁵
Cynomys leucurus

Black-tailed Prairie Dog ⁶
Cynomys ludovicianus

Uinta Chipmunk ⁷
Tamias umbrinus

Least Chipmunk ⁸
Tamias minimus

Colorado Chipmunk ⁹
Tamias quadrivittatus

American Red Squirrel ¹⁰
Tamiasciurus hudsonicus

American Water Shrew ¹¹
Sorex palustris

Dwarf Shrew
Sorex nanus

American Pygmy Shrew ¹²
Sorex hoyi

Dusky Shrew ¹
Sorex monticolus

Merriam's Shrew ¹
Sorex merriami

North American Least Shrew ¹³
Cryptotis parva

Rainbow Trout ¹⁴
Oncorhynchus mykiss

Brown Trout ¹⁵
Salmo trutta

Bluegill ¹⁶
Lepomis macrochirus

Brook Trout ¹⁷
Salvelinus fontinalis

Red-eared Slider ¹⁸
Trachemys scripta elegans

European Carp ¹⁹
Cyprinus carpio

Western Spotted Skunk
Spilogale gracilis

Green Sunfish ²⁰
Lepomis cyanellus

Western Mosquitofish ²¹
Gambusia affinis

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

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Wildlife of Boulder County

Sagebrush Vole 1 Lemmiscus curtatus

Abert's Squirrel 2 Sciurus aberti

Fox Squirrel 3 Sciurus niger

Yellow-bellied Marmot 4 Marmota flaviventris

White-tailed Prairie Dog 5 Cynomys leucurus

Black-tailed Prairie Dog 6 Cynomys ludovicianus

Uinta Chipmunk 7 Tamias umbrinus

Least Chipmunk 8 Tamias minimus

Colorado Chipmunk 9 Tamias quadrivittatus

American Red Squirrel 10 Tamiasciurus hudsonicus

American Water Shrew 11 Sorex palustris

Dwarf Shrew Sorex nanus

American Pygmy Shrew 12 Sorex hoyi

Dusky Shrew 1 Sorex monticolus

Merriam's Shrew 1 Sorex merriami

North American Least Shrew 13 Cryptotis parva

Rainbow Trout 14 Oncorhynchus mykiss

Brown Trout 15 Salmo trutta

Bluegill 16 Lepomis macrochirus

Brook Trout 17 Salvelinus fontinalis

Red-eared Slider 18 Trachemys scripta elegans

European Carp 19 Cyprinus carpio

Western Spotted Skunk Spilogale gracilis

Green Sunfish 20 Lepomis cyanellus

Western Mosquitofish 21 Gambusia affinis