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Mammals of Wyoming

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

62,193
recent observations
50
species listed
50
mammals

Naturalists have logged 62,193 research-grade observations across the 50 most-recorded species in Wyoming. The most frequently seen is the American Bison, with 11,932 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
11,932 observations · iNaturalist
Wapiti
Cervus canadensis
7,109 observations
Pronghorn
Antilocapra americana
5,163 observations
Moose
Alces alces
4,812 observations
Mule Deer
Odocoileus hemionus
3,824 observations
American Black Bear
Ursus americanus
3,477 observations
Yellow-bellied Marmot
Marmota flaviventris
2,695 observations
Uinta Ground Squirrel
Urocitellus armatus
2,665 observations
Brown Bear
Ursus arctos
2,551 observations
Coyote
Canis latrans
2,174 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,842 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
1,804 observations
Bighorn Sheep
Ovis canadensis
1,473 observations
Gray Wolf
Canis lupus
1,290 observations
American Pika
Ochotona princeps
1,118 observations
Red Fox
Vulpes vulpes
1,101 observations
Black-tailed Prairie Dog
Cynomys ludovicianus
693 observations
Least Chipmunk
Neotamias minimus
659 observations
American Beaver
Castor canadensis
503 observations
Mountain Goat
Oreamnos americanus
493 observations
American Badger
Taxidea taxus
456 observations
White-tailed Prairie Dog
Cynomys leucurus
456 observations
White-tailed Deer
Odocoileus virginianus
412 observations
Muskrat
Ondatra zibethicus
326 observations
Eastern Fox Squirrel
Sciurus niger
294 observations
Wyoming Ground Squirrel
Urocitellus elegans
268 observations
Snowshoe Hare
Lepus americanus
244 observations
Yellow-pine Chipmunk
Neotamias amoenus
226 observations
Mountain Cottontail
Sylvilagus nuttallii
209 observations
North American River Otter
Lontra canadensis
196 observations
White-tailed Jackrabbit
Lepus townsendii
195 observations
Pacific Marten
Martes caurina
167 observations
North American Porcupine
Erethizon dorsatum
160 observations
Long-tailed Weasel
Neogale frenata
143 observations · iNaturalist
Domestic Horse
Equus caballus
136 observations
Common Raccoon
Procyon lotor
108 observations
Swift Fox
Vulpes velox
97 observations
Desert Cottontail
Sylvilagus audubonii
82 observations
Uinta Chipmunk
Neotamias umbrinus
82 observations
Striped Skunk
Mephitis mephitis
77 observations
Mountain Lion
Puma concolor
76 observations
American Mink
Neogale vison
70 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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