Mammals of Yellowstone National Park
The mammals most often spotted in Yellowstone, ranked by recent research-grade observations.
34,449
recent observations
50
species listed
50
mammals
Naturalists have logged 34,449 research-grade observations across the 50 most-recorded species in Yellowstone. The most frequently seen is the American Bison, with 10,085 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
10,085 observations · iNaturalist
Wapiti
Cervus canadensis
5,735 observations
American Black Bear
Ursus americanus
2,504 observations
Pronghorn
Antilocapra americana
2,077 observations
Brown Bear
Ursus arctos
1,863 observations
Coyote
Canis latrans
1,683 observations
Uinta Ground Squirrel
Urocitellus armatus
1,398 observations · iNaturalist
Gray Wolf
Canis lupus
1,173 observations
Mule Deer
Odocoileus hemionus
1,092 observations
Yellow-bellied Marmot
Marmota flaviventris
1,088 observations
Bighorn Sheep
Ovis canadensis
1,043 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
790 observations
American Red Squirrel
Tamiasciurus hudsonicus
727 observations
Moose
Alces alces
685 observations
Red Fox
Vulpes vulpes
506 observations
Mountain Goat
Oreamnos americanus
266 observations
American Badger
Taxidea taxus
219 observations
Least Chipmunk
Neotamias minimus
208 observations
American Pika
Ochotona princeps
186 observations
Snowshoe Hare
Lepus americanus
181 observations
Muskrat
Ondatra zibethicus
152 observations
Yellow-pine Chipmunk
Neotamias amoenus
149 observations
North American River Otter
Lontra canadensis
96 observations
Mountain Cottontail
Sylvilagus nuttallii
93 observations
American Beaver
Castor canadensis
86 observations
Pacific Marten
Martes caurina
63 observations · iNaturalist
White-tailed Deer
Odocoileus virginianus
49 observations
Long-tailed Weasel
Neogale frenata
38 observations · iNaturalist
White-tailed Jackrabbit
Lepus townsendii
36 observations
Uinta Chipmunk
Neotamias umbrinus
30 observations · iNaturalist
Northern Pocket Gopher
Thomomys talpoides
27 observations · iNaturalist
North American Porcupine
Erethizon dorsatum
26 observations
Mountain Lion
Puma concolor
21 observations
Western Deer Mouse
Peromyscus sonoriensis
13 observations · iNaturalist
Bobcat
Lynx rufus
11 observations
American Ermine
Mustela richardsonii
8 observations · iNaturalist
Southern Red-backed Vole
Clethrionomys gapperi
8 observations · iNaturalist
Little Brown Bat
Myotis lucifugus
7 observations
Bushy-tailed Woodrat
Neotoma cinerea
7 observations
Striped Skunk
Mephitis mephitis
5 observations
Common Raccoon
Procyon lotor
4 observations
Long-legged Myotis
Myotis volans
2 observations
Western Water Shrew
Sorex navigator
2 observations · iNaturalist
Long-eared Myotis
Myotis evotis
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 · iNaturalist
Domestic Cat
Felis catus
1 observation
Mule × White-tailed Deer
Odocoileus hemionus × virginianus
1 observation · iNaturalist
Mammals in nearby places
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