Mammals of Colorado
The mammals most often spotted in Colorado, ranked by recent research-grade observations.
100,305
recent observations
50
species listed
50
mammals
Naturalists have logged 100,305 research-grade observations across the 50 most-recorded species in Colorado. The most frequently seen is the Mule Deer, with 16,788 recorded sightings.
Rarer finds confirmed in Colorado include Bobcat - uncommon enough that a sighting is worth logging.
Most-observed mammals in Colorado
Mule Deer
Odocoileus hemionus
16,788 observations
Wapiti
Cervus canadensis
8,624 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
7,249 observations
Black-tailed Prairie Dog
Cynomys ludovicianus
6,588 observations
Eastern Fox Squirrel
Sciurus niger
6,485 observations
Yellow-bellied Marmot
Marmota flaviventris
6,339 observations
Moose
Alces alces
5,843 observations
Bighorn Sheep
Ovis canadensis
4,553 observations
American Pika
Ochotona princeps
3,418 observations
Pronghorn
Antilocapra americana
2,889 observations
Coyote
Canis latrans
2,869 observations
Red Fox
Vulpes vulpes
2,569 observations
White-tailed Deer
Odocoileus virginianus
2,141 observations
American Black Bear
Ursus americanus
2,032 observations
Common Raccoon
Procyon lotor
1,646 observations
American Beaver
Castor canadensis
1,619 observations
Mountain Goat
Oreamnos americanus
1,554 observations
Muskrat
Ondatra zibethicus
1,319 observations
Fremont's Squirrel
Tamiasciurus fremonti
1,276 observations
Wyoming Ground Squirrel
Urocitellus elegans
1,228 observations
Abert's Squirrel
Sciurus aberti
1,015 observations
American Bison
Bos bison
1,000 observations · iNaturalist
Desert Cottontail
Sylvilagus audubonii
955 observations
Least Chipmunk
Neotamias minimus
946 observations
Bobcat
Lynx rufus
829 observations
Mountain Cottontail
Sylvilagus nuttallii
822 observations
Rock Squirrel
Otospermophilus variegatus
802 observations
Snowshoe Hare
Lepus americanus
507 observations
Gunnison's Prairie Dog
Cynomys gunnisoni
506 observations
North American Porcupine
Erethizon dorsatum
495 observations
White-tailed Prairie Dog
Cynomys leucurus
439 observations
Long-tailed Weasel
Neogale frenata
428 observations · iNaturalist
Black-tailed Jackrabbit
Lepus californicus
387 observations
Striped Skunk
Mephitis mephitis
382 observations
American Mink
Neogale vison
371 observations
Pacific Marten
Martes caurina
365 observations
Mountain Lion
Puma concolor
363 observations
Colorado Chipmunk
Neotamias quadrivittatus
326 observations
American Badger
Taxidea taxus
309 observations
American Red Squirrel
Tamiasciurus hudsonicus
306 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
263 observations
Domestic Horse
Equus caballus
240 observations · iNaturalist
Eastern Cottontail
Sylvilagus floridanus
215 observations
Domestic Cat
Felis catus
182 observations
Swift Fox
Vulpes velox
171 observations
Gray Fox
Urocyon cinereoargenteus
164 observations
White-tailed Jackrabbit
Lepus townsendii
155 observations
Uinta Chipmunk
Neotamias umbrinus
114 observations
Western Deer Mouse
Peromyscus sonoriensis
111 observations
North American River Otter
Lontra canadensis
108 observations
Mammals in nearby places
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