Mammals of Chicago, Illinois
The mammals most often spotted near Chicago, ranked by recent research-grade observations.
Most-observed mammals near Chicago
Eastern Gray Squirrel
Sciurus carolinensis
6,979 observations
Eastern Cottontail
Sylvilagus floridanus
4,109 observations
White-tailed Deer
Odocoileus virginianus
3,987 observations
Eastern Chipmunk
Tamias striatus
2,082 observations
Common Raccoon
Procyon lotor
1,342 observations
Coyote
Canis latrans
1,029 observations
Eastern Fox Squirrel
Sciurus niger
790 observations
Virginia Opossum
Didelphis virginiana
788 observations
Muskrat
Ondatra zibethicus
719 observations
American Beaver
Castor canadensis
671 observations
Domestic Cat
Felis catus
570 observations
Brown Rat
Rattus norvegicus
323 observations
Striped Skunk
Mephitis mephitis
268 observations
Red Fox
Vulpes vulpes
226 observations
Silver-haired Bat
Lasionycteris noctivagans
203 observations
American Mink
Neogale vison
157 observations
Eastern Red Bat
Lasiurus borealis
149 observations
Northern Short-tailed Shrew
Blarina brevicauda
146 observations
Groundhog
Marmota monax
131 observations
Southern Flying Squirrel
Glaucomys volans
98 observations
House Mouse
Mus musculus
66 observations
White-footed Mouse
Peromyscus leucopus
51 observations
Western Meadow Vole
Microtus drummondii
44 observations · iNaturalist
Eastern Mole
Scalopus aquaticus
32 observations
American Red Squirrel
Tamiasciurus hudsonicus
30 observations
Big Brown Bat
Eptesicus fuscus
25 observations
Eastern Deermouse
Peromyscus maniculatus
24 observations
Masked Shrew
Sorex cinereus
22 observations
Northern Hoary Bat
Lasiurus cinereus
12 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
9 observations
North American River Otter
Lontra canadensis
4 observations
European Rabbit
Oryctolagus cuniculus
4 observations · iNaturalist
Domestic Dog
Canis familiaris
4 observations · iNaturalist
American Ermine
Mustela richardsonii
4 observations · iNaturalist
Prairie Vole
Microtus ochrogaster
3 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
2 observations
Long-tailed Weasel
Neogale frenata
2 observations · iNaturalist
Evening Bat
Nycticeius humeralis
1 observation
Mexican Free-tailed Bat
Tadarida brasiliensis
1 observation
Bobcat
Lynx rufus
1 observation
European Fallow Deer
Dama dama
1 observation · iNaturalist
Mongolian Jird
Meriones unguiculatus
1 observation · iNaturalist
Least Weasel
Mustela nivalis
1 observation