Mammals of Chicago, Illinois
The mammals most often spotted near Chicago, ranked by recent research-grade observations.
26,152
recent observations
43
species listed
43
mammals
Naturalists have logged 26,152 research-grade observations across the 43 most-recorded species near Chicago. The most frequently seen is the Eastern Gray Squirrel, with 7,189 recorded sightings.
Rarer finds confirmed near Chicago include Bobcat - uncommon enough that a sighting is worth logging.
Most-observed mammals near Chicago
Eastern Gray Squirrel
Sciurus carolinensis
7,189 observations
Eastern Cottontail
Sylvilagus floridanus
4,404 observations
White-tailed Deer
Odocoileus virginianus
4,149 observations
Eastern Chipmunk
Tamias striatus
2,193 observations
Common Raccoon
Procyon lotor
1,398 observations
Coyote
Canis latrans
1,067 observations
Virginia Opossum
Didelphis virginiana
811 observations
Eastern Fox Squirrel
Sciurus niger
805 observations
Muskrat
Ondatra zibethicus
737 observations
American Beaver
Castor canadensis
688 observations
Domestic Cat
Felis catus
583 observations
Brown Rat
Rattus norvegicus
337 observations
Striped Skunk
Mephitis mephitis
287 observations
Red Fox
Vulpes vulpes
234 observations
Silver-haired Bat
Lasionycteris noctivagans
209 observations
American Mink
Neogale vison
165 observations
Eastern Red Bat
Lasiurus borealis
157 observations
Northern Short-tailed Shrew
Blarina brevicauda
150 observations
Groundhog
Marmota monax
139 observations
Southern Flying Squirrel
Glaucomys volans
101 observations
House Mouse
Mus musculus
68 observations
White-footed Mouse
Peromyscus leucopus
51 observations
Western Meadow Vole
Microtus drummondii
44 observations
American Red Squirrel
Tamiasciurus hudsonicus
32 observations
Eastern Mole
Scalopus aquaticus
32 observations
Big Brown Bat
Eptesicus fuscus
26 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
10 observations
North American River Otter
Lontra canadensis
4 observations
European Rabbit
Oryctolagus cuniculus
4 observations · iNaturalist
Domestic Dog
Canis familiaris
4 observations · iNaturalist
Prairie Vole
Microtus ochrogaster
3 observations
American Ermine
Mustela richardsonii
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
Mongolian Jird
Meriones unguiculatus
1 observation · iNaturalist
Least Weasel
Mustela nivalis
1 observation
Mammals in nearby places
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