Mammals of Chicago, Illinois
The mammals most often spotted near Chicago, ranked by recent research-grade observations.
25,861
recent observations
44
species listed
44
mammals
Naturalists have logged 25,861 research-grade observations across the 44 most-recorded species near Chicago. The most frequently seen is the Eastern Gray Squirrel, with 7,106 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
7,106 observations
Eastern Cottontail
Sylvilagus floridanus
4,331 observations
White-tailed Deer
Odocoileus virginianus
4,099 observations
Eastern Chipmunk
Tamias striatus
2,173 observations
Common Raccoon
Procyon lotor
1,383 observations
Coyote
Canis latrans
1,061 observations
Virginia Opossum
Didelphis virginiana
806 observations
Eastern Fox Squirrel
Sciurus niger
805 observations
Muskrat
Ondatra zibethicus
735 observations
American Beaver
Castor canadensis
679 observations
Domestic Cat
Felis catus
580 observations
Brown Rat
Rattus norvegicus
334 observations
Striped Skunk
Mephitis mephitis
281 observations
Red Fox
Vulpes vulpes
233 observations
Silver-haired Bat
Lasionycteris noctivagans
204 observations
American Mink
Neogale vison
162 observations
Eastern Red Bat
Lasiurus borealis
154 observations
Northern Short-tailed Shrew
Blarina brevicauda
147 observations
Groundhog
Marmota monax
138 observations
Southern Flying Squirrel
Glaucomys volans
100 observations
House Mouse
Mus musculus
67 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
31 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
American Ermine
Mustela richardsonii
4 observations · iNaturalist
Prairie Vole
Microtus ochrogaster
3 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
2 observations
Least Weasel
Mustela nivalis
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
Wapiti
Cervus canadensis
1 observation
Mammals in nearby places
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