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Mammals of Wyoming

The mammals most often spotted in Wyoming, ranked by recent research-grade observations.

62,389
recent observations
50
species listed
50
mammals

Naturalists have logged 62,389 research-grade observations across the 50 most-recorded species in Wyoming. The most frequently seen is the American Bison, with 11,961 recorded sightings.

Rarer finds confirmed in Wyoming include Grizzly Bear, Gray Wolf and Bobcat - uncommon enough that a sighting is worth logging.

Grizzly BearGray WolfBobcat

Most-observed mammals in Wyoming

American Bison
Bos bison
11,961 observations · iNaturalist
Wapiti
Cervus canadensis
7,123 observations
Pronghorn
Antilocapra americana
5,171 observations
Moose
Alces alces
4,829 observations
Mule Deer
Odocoileus hemionus
3,840 observations
American Black Bear
Ursus americanus
3,484 observations
Yellow-bellied Marmot
Marmota flaviventris
2,699 observations
Uinta Ground Squirrel
Urocitellus armatus
2,668 observations
Brown Bear
Ursus arctos
2,559 observations
Coyote
Canis latrans
2,181 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,850 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
1,804 observations
Bighorn Sheep
Ovis canadensis
1,479 observations
Gray Wolf
Canis lupus
1,294 observations
American Pika
Ochotona princeps
1,121 observations
Red Fox
Vulpes vulpes
1,107 observations
Black-tailed Prairie Dog
Cynomys ludovicianus
694 observations
Least Chipmunk
Neotamias minimus
671 observations
American Beaver
Castor canadensis
504 observations
Mountain Goat
Oreamnos americanus
494 observations
American Badger
Taxidea taxus
461 observations
White-tailed Prairie Dog
Cynomys leucurus
456 observations
White-tailed Deer
Odocoileus virginianus
413 observations
Muskrat
Ondatra zibethicus
326 observations
Eastern Fox Squirrel
Sciurus niger
303 observations
Wyoming Ground Squirrel
Urocitellus elegans
270 observations
Snowshoe Hare
Lepus americanus
245 observations
Yellow-pine Chipmunk
Neotamias amoenus
227 observations
Mountain Cottontail
Sylvilagus nuttallii
211 observations
White-tailed Jackrabbit
Lepus townsendii
200 observations
North American River Otter
Lontra canadensis
197 observations
Pacific Marten
Martes caurina
167 observations
North American Porcupine
Erethizon dorsatum
162 observations
Long-tailed Weasel
Neogale frenata
144 observations · iNaturalist
Domestic Horse
Equus caballus
137 observations
Common Raccoon
Procyon lotor
112 observations
Swift Fox
Vulpes velox
97 observations
Uinta Chipmunk
Neotamias umbrinus
86 observations
Desert Cottontail
Sylvilagus audubonii
82 observations
Striped Skunk
Mephitis mephitis
77 observations
Mountain Lion
Puma concolor
77 observations
American Mink
Neogale vison
71 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
64 observations
Northern Pocket Gopher
Thomomys talpoides
56 observations
Western Deer Mouse
Peromyscus sonoriensis
55 observations
Bobcat
Lynx rufus
36 observations
Eastern Gray Squirrel
Sciurus carolinensis
35 observations
Domestic Cattle
Bos taurus
34 observations
Bushy-tailed Woodrat
Neotoma cinerea
31 observations
American Ermine
Mustela richardsonii
24 observations

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

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