Mammals of Yellowstone National Park
The mammals most often spotted in Yellowstone, ranked by recent research-grade observations.
36,049
recent observations
50
species listed
50
mammals
Naturalists have logged 36,049 research-grade observations across the 50 most-recorded species in Yellowstone. The most frequently seen is the American Bison, with 10,600 recorded sightings.
Rarer finds confirmed in Yellowstone include Grizzly Bear, Gray Wolf and Bobcat - uncommon enough that a sighting is worth logging.
Most-observed mammals in Yellowstone
American Bison
Bos bison
10,600 observations · iNaturalist
Wapiti
Cervus canadensis
6,018 observations
American Black Bear
Ursus americanus
2,581 observations
Pronghorn
Antilocapra americana
2,223 observations
Brown Bear
Ursus arctos
1,913 observations
Coyote
Canis latrans
1,749 observations
Uinta Ground Squirrel
Urocitellus armatus
1,441 observations
Gray Wolf
Canis lupus
1,203 observations
Mule Deer
Odocoileus hemionus
1,171 observations
Yellow-bellied Marmot
Marmota flaviventris
1,138 observations
Bighorn Sheep
Ovis canadensis
1,082 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
835 observations
American Red Squirrel
Tamiasciurus hudsonicus
781 observations
Moose
Alces alces
706 observations
Red Fox
Vulpes vulpes
524 observations
Mountain Goat
Oreamnos americanus
291 observations
American Badger
Taxidea taxus
223 observations
Least Chipmunk
Neotamias minimus
212 observations
American Pika
Ochotona princeps
195 observations
Snowshoe Hare
Lepus americanus
187 observations
Muskrat
Ondatra zibethicus
157 observations
Yellow-pine Chipmunk
Neotamias amoenus
150 observations
North American River Otter
Lontra canadensis
99 observations
Mountain Cottontail
Sylvilagus nuttallii
98 observations
American Beaver
Castor canadensis
88 observations
Pacific Marten
Martes caurina
67 observations
White-tailed Deer
Odocoileus virginianus
53 observations
Long-tailed Weasel
Neogale frenata
42 observations · iNaturalist
White-tailed Jackrabbit
Lepus townsendii
36 observations
Uinta Chipmunk
Neotamias umbrinus
34 observations
Northern Pocket Gopher
Thomomys talpoides
28 observations
North American Porcupine
Erethizon dorsatum
26 observations
Mountain Lion
Puma concolor
21 observations
Western Deer Mouse
Peromyscus sonoriensis
13 observations
Bobcat
Lynx rufus
11 observations
Bushy-tailed Woodrat
Neotoma cinerea
8 observations
American Ermine
Mustela richardsonii
8 observations
Southern Red-backed Vole
Clethrionomys gapperi
8 observations · iNaturalist
Little Brown Bat
Myotis lucifugus
7 observations
Striped Skunk
Mephitis mephitis
6 observations
Common Raccoon
Procyon lotor
5 observations
Long-legged Myotis
Myotis volans
2 observations
Western Water Shrew
Sorex navigator
2 observations · iNaturalist
Long-eared Myotis
Myotis evotis
1 observation
Big Brown Bat
Eptesicus fuscus
1 observation
Northern Hoary Bat
Lasiurus cinereus
1 observation
Black-tailed Prairie Dog
Cynomys ludovicianus
1 observation
Northern Flying Squirrel
Glaucomys sabrinus
1 observation
Western Small-footed Myotis
Myotis ciliolabrum
1 observation
Domestic Cat
Felis catus
1 observation
Mammals in nearby places
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