Mammals of Rocky Mountain National Park
The mammals most often spotted in Rocky Mountain, ranked by recent research-grade observations.
Most-observed mammals in Rocky Mountain
Elk
Cervus canadensis
5,315 observations
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
2,752 observations
Yellow-bellied Marmot
Marmota flaviventris
2,205 observations
Moose
Alces alces
2,118 observations
Mule Deer
Odocoileus hemionus
1,944 observations
American Pika
Ochotona princeps
1,080 observations
Bighorn Sheep
Ovis canadensis
476 observations
Wyoming Ground Squirrel
Urocitellus elegans
474 observations
Coyote
Canis latrans
257 observations
Fremont's Squirrel
Tamiasciurus fremonti
234 observations · iNaturalist
Least Chipmunk
Neotamias minimus
233 observations
Snowshoe Hare
Lepus americanus
174 observations
American Red Squirrel
Tamiasciurus hudsonicus
162 observations
Mountain Cottontail
Sylvilagus nuttallii
159 observations
Abert's Squirrel
Sciurus aberti
123 observations
American Black Bear
Ursus americanus
116 observations
Muskrat
Ondatra zibethicus
113 observations
Pacific Marten
Martes caurina
86 observations · iNaturalist
Red Fox
Vulpes vulpes
83 observations
Long-tailed Weasel
Neogale frenata
65 observations · iNaturalist
Colorado Chipmunk
Neotamias quadrivittatus
60 observations
Uinta Chipmunk
Neotamias umbrinus
43 observations · iNaturalist
Bobcat
Lynx rufus
27 observations
American Mink
Neogale vison
25 observations
Mountain Goat
Oreamnos americanus
19 observations
American Beaver
Castor canadensis
19 observations
American Ermine
Mustela richardsonii
17 observations · iNaturalist
Northern Pocket Gopher
Thomomys talpoides
15 observations · iNaturalist
Pronghorn
Antilocapra americana
12 observations
Mountain Lion
Puma concolor
9 observations
North American River Otter
Lontra canadensis
8 observations
Little Brown Bat
Myotis lucifugus
7 observations
American Badger
Taxidea taxus
6 observations
Eastern Fox Squirrel
Sciurus niger
4 observations
Rock Squirrel
Otospermophilus variegatus
4 observations
Western Deer Mouse
Peromyscus sonoriensis
4 observations · iNaturalist
Western Meadow Vole
Microtus drummondii
4 observations · iNaturalist
Bushy-tailed Woodrat
Neotoma cinerea
3 observations
Long-eared Myotis
Myotis evotis
2 observations
Common Raccoon
Procyon lotor
2 observations
Desert Cottontail
Sylvilagus audubonii
2 observations
North American Porcupine
Erethizon dorsatum
2 observations
Black-tailed Prairie Dog
Cynomys ludovicianus
2 observations
Western Spotted Skunk
Spilogale gracilis
2 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
2 observations
Southern Red-backed Vole
Clethrionomys gapperi
2 observations · iNaturalist
Big Brown Bat
Eptesicus fuscus
1 observation
Northern Hoary Bat
Lasiurus cinereus
1 observation
Silver-haired Bat
Lasionycteris noctivagans
1 observation
Striped Skunk
Mephitis mephitis
1 observation