Mammals of Colorado
The mammals most often spotted in Colorado, ranked by recent research-grade observations.
98,531
recent observations
50
species listed
50
mammals
Naturalists have logged 98,531 research-grade observations across the 50 most-recorded species in Colorado. The most frequently seen is the Mule Deer, with 16,511 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
16,511 observations
Wapiti
Cervus canadensis
8,500 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
7,117 observations
Black-tailed Prairie Dog
Cynomys ludovicianus
6,488 observations
Eastern Fox Squirrel
Sciurus niger
6,405 observations
Yellow-bellied Marmot
Marmota flaviventris
6,214 observations
Moose
Alces alces
5,735 observations
Bighorn Sheep
Ovis canadensis
4,496 observations
American Pika
Ochotona princeps
3,299 observations
Pronghorn
Antilocapra americana
2,863 observations
Coyote
Canis latrans
2,838 observations
Red Fox
Vulpes vulpes
2,546 observations
White-tailed Deer
Odocoileus virginianus
2,121 observations
American Black Bear
Ursus americanus
1,972 observations
Common Raccoon
Procyon lotor
1,614 observations
Mountain Goat
Oreamnos americanus
1,524 observations
American Beaver
Castor canadensis
1,522 observations
Muskrat
Ondatra zibethicus
1,314 observations
Fremont's Squirrel
Tamiasciurus fremonti
1,265 observations · iNaturalist
Wyoming Ground Squirrel
Urocitellus elegans
1,225 observations
Abert's Squirrel
Sciurus aberti
997 observations
American Bison
Bos bison
968 observations · iNaturalist
Desert Cottontail
Sylvilagus audubonii
954 observations
Least Chipmunk
Neotamias minimus
893 observations
Bobcat
Lynx rufus
818 observations
Mountain Cottontail
Sylvilagus nuttallii
814 observations
Rock Squirrel
Otospermophilus variegatus
789 observations
Snowshoe Hare
Lepus americanus
490 observations
North American Porcupine
Erethizon dorsatum
489 observations
Gunnison's Prairie Dog
Cynomys gunnisoni
488 observations
White-tailed Prairie Dog
Cynomys leucurus
431 observations
Long-tailed Weasel
Neogale frenata
414 observations · iNaturalist
Black-tailed Jackrabbit
Lepus californicus
380 observations
Striped Skunk
Mephitis mephitis
378 observations
American Mink
Neogale vison
359 observations
Mountain Lion
Puma concolor
356 observations
Pacific Marten
Martes caurina
351 observations · iNaturalist
American Badger
Taxidea taxus
307 observations
American Red Squirrel
Tamiasciurus hudsonicus
304 observations
Colorado Chipmunk
Neotamias quadrivittatus
290 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
259 observations
Domestic Horse
Equus caballus
239 observations · iNaturalist
Eastern Cottontail
Sylvilagus floridanus
215 observations
Domestic Cat
Felis catus
180 observations
Swift Fox
Vulpes velox
170 observations
Gray Fox
Urocyon cinereoargenteus
162 observations
White-tailed Jackrabbit
Lepus townsendii
151 observations
North American River Otter
Lontra canadensis
110 observations
Western Deer Mouse
Peromyscus sonoriensis
109 observations · iNaturalist
House Mouse
Mus musculus
97 observations
Mammals in nearby places
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