Mammals of Custer State Park
The mammals most often spotted in Custer, ranked by recent research-grade observations.
Most-observed mammals in Custer
American Bison
Bison bison
982 observations
Pronghorn
Antilocapra americana
549 observations
Black-tailed Prairie Dog
Cynomys ludovicianus
278 observations
Bighorn Sheep
Ovis canadensis
258 observations
White-tailed Deer
Odocoileus virginianus
209 observations
Donkey
Equus asinus
126 observations · iNaturalist
Elk
Cervus canadensis
84 observations
American Red Squirrel
Tamiasciurus hudsonicus
72 observations
Least Chipmunk
Neotamias minimus
67 observations
Coyote
Canis latrans
42 observations
Mule Deer
Odocoileus hemionus
42 observations
Yellow-bellied Marmot
Marmota flaviventris
31 observations
Mountain Goat
Oreamnos americanus
27 observations
American Mink
Neogale vison
7 observations
Mountain Cottontail
Sylvilagus nuttallii
5 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
5 observations
American Black Bear
Ursus americanus
2 observations
American Badger
Taxidea taxus
2 observations
Bobcat
Lynx rufus
2 observations
Mountain Lion
Puma concolor
2 observations
American Beaver
Castor canadensis
2 observations
Eastern Fox Squirrel
Sciurus niger
2 observations
Domestic Cattle
Bos taurus
2 observations · iNaturalist
Fringed Myotis
Myotis thysanodes
1 observation
Common Raccoon
Procyon lotor
1 observation
Red Fox
Vulpes vulpes
1 observation
Eastern Cottontail
Sylvilagus floridanus
1 observation
Desert Cottontail
Sylvilagus audubonii
1 observation
Northern Pocket Gopher
Thomomys talpoides
1 observation · iNaturalist
Muskrat
Ondatra zibethicus
1 observation
Western Small-footed Myotis
Myotis ciliolabrum
1 observation · iNaturalist
Domestic Cat
Felis catus
1 observation
Domestic Horse
Equus caballus
1 observation · iNaturalist
Least Weasel
Mustela nivalis
1 observation
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