Mammals of Colorado
The mammals most often spotted in Colorado, ranked by recent research-grade observations.
102,628
recent observations
50
species listed
50
mammals
Naturalists have logged 102,628 research-grade observations across the 50 most-recorded species in Colorado. The most frequently seen is the Mule Deer, with 17,115 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
17,115 observations
Wapiti
Cervus canadensis
8,842 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
7,393 observations
Black-tailed Prairie Dog
Cynomys ludovicianus
6,701 observations
Eastern Fox Squirrel
Sciurus niger
6,671 observations
Yellow-bellied Marmot
Marmota flaviventris
6,479 observations
Moose
Alces alces
6,019 observations
Bighorn Sheep
Ovis canadensis
4,639 observations
American Pika
Ochotona princeps
3,539 observations
Pronghorn
Antilocapra americana
2,946 observations
Coyote
Canis latrans
2,919 observations
Red Fox
Vulpes vulpes
2,612 observations
White-tailed Deer
Odocoileus virginianus
2,186 observations
American Black Bear
Ursus americanus
2,125 observations
Common Raccoon
Procyon lotor
1,701 observations
American Beaver
Castor canadensis
1,656 observations
Mountain Goat
Oreamnos americanus
1,580 observations
Muskrat
Ondatra zibethicus
1,344 observations
Fremont's Squirrel
Tamiasciurus fremonti
1,317 observations
Wyoming Ground Squirrel
Urocitellus elegans
1,240 observations
Abert's Squirrel
Sciurus aberti
1,031 observations
American Bison
Bos bison
1,028 observations · iNaturalist
Least Chipmunk
Neotamias minimus
993 observations
Desert Cottontail
Sylvilagus audubonii
961 observations
Bobcat
Lynx rufus
846 observations
Mountain Cottontail
Sylvilagus nuttallii
845 observations
Rock Squirrel
Otospermophilus variegatus
808 observations
Snowshoe Hare
Lepus americanus
519 observations
Gunnison's Prairie Dog
Cynomys gunnisoni
516 observations
North American Porcupine
Erethizon dorsatum
499 observations
White-tailed Prairie Dog
Cynomys leucurus
443 observations
Long-tailed Weasel
Neogale frenata
438 observations · iNaturalist
Striped Skunk
Mephitis mephitis
405 observations
Black-tailed Jackrabbit
Lepus californicus
390 observations
Pacific Marten
Martes caurina
381 observations
American Mink
Neogale vison
378 observations
Mountain Lion
Puma concolor
368 observations
Colorado Chipmunk
Neotamias quadrivittatus
351 observations
American Badger
Taxidea taxus
317 observations
American Red Squirrel
Tamiasciurus hudsonicus
311 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
266 observations
Domestic Horse
Equus caballus
246 observations · iNaturalist
Eastern Cottontail
Sylvilagus floridanus
216 observations
Domestic Cat
Felis catus
189 observations
Swift Fox
Vulpes velox
174 observations
Gray Fox
Urocyon cinereoargenteus
167 observations
White-tailed Jackrabbit
Lepus townsendii
158 observations
Uinta Chipmunk
Neotamias umbrinus
127 observations
North American River Otter
Lontra canadensis
122 observations
Western Deer Mouse
Peromyscus sonoriensis
111 observations
Mammals in nearby places
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