Mammals of Wisconsin
The mammals most often spotted in Wisconsin, ranked by recent research-grade observations.
Most-observed mammals in Wisconsin
White-tailed Deer
Odocoileus virginianus
10,671 observations
Eastern Gray Squirrel
Sciurus carolinensis
7,530 observations
Eastern Cottontail
Sylvilagus floridanus
4,511 observations
Eastern Chipmunk
Tamias striatus
4,353 observations
American Red Squirrel
Tamiasciurus hudsonicus
2,937 observations
Common Raccoon
Procyon lotor
2,117 observations
Coyote
Canis latrans
1,938 observations
Muskrat
Ondatra zibethicus
1,887 observations
Red Fox
Vulpes vulpes
1,875 observations
American Beaver
Castor canadensis
1,297 observations
Groundhog
Marmota monax
1,259 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
1,128 observations
Virginia Opossum
Didelphis virginiana
951 observations
North American Porcupine
Erethizon dorsatum
809 observations
American Black Bear
Ursus americanus
808 observations
American Mink
Neogale vison
553 observations
Northern Short-tailed Shrew
Blarina brevicauda
461 observations
North American River Otter
Lontra canadensis
394 observations
Eastern Fox Squirrel
Sciurus niger
350 observations
Domestic Cat
Felis catus
323 observations
Striped Skunk
Mephitis mephitis
308 observations
Gray Wolf
Canis lupus
298 observations
Bobcat
Lynx rufus
269 observations
Franklin's Ground Squirrel
Poliocitellus franklinii
232 observations · iNaturalist
Western Meadow Vole
Microtus drummondii
223 observations · iNaturalist
Big Brown Bat
Eptesicus fuscus
195 observations
Snowshoe Hare
Lepus americanus
186 observations
Fisher
Pekania pennanti
173 observations
Moose
Alces alces
133 observations
American Ermine
Mustela richardsonii
117 observations · iNaturalist
Gray Fox
Urocyon cinereoargenteus
115 observations
Southern Flying Squirrel
Glaucomys volans
109 observations
Southern Red-backed Vole
Clethrionomys gapperi
101 observations · iNaturalist
American Badger
Taxidea taxus
97 observations
White-footed Mouse
Peromyscus leucopus
87 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
85 observations
Eastern Mole
Scalopus aquaticus
85 observations
Elk
Cervus canadensis
83 observations
Eastern Deermouse
Peromyscus maniculatus
79 observations
Star-nosed Mole
Condylura cristata
79 observations
Least Chipmunk
Neotamias minimus
72 observations
Masked Shrew
Sorex cinereus
68 observations
Silver-haired Bat
Lasionycteris noctivagans
64 observations
Little Brown Bat
Myotis lucifugus
55 observations
Plains Pocket Gopher
Geomys bursarius
54 observations
Eastern Red Bat
Lasiurus borealis
53 observations
Northern Flying Squirrel
Glaucomys sabrinus
51 observations
Brown Rat
Rattus norvegicus
46 observations
American Marten
Martes americana
39 observations
House Mouse
Mus musculus
32 observations