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Eastern Gray Squirrel
Sciurus carolinensis
14,142 observations
White-tailed Deer
Odocoileus virginianus
10,288 observations
Eastern Cottontail
Sylvilagus floridanus
9,056 observations
Eastern Chipmunk
Tamias striatus
4,737 observations
Common Raccoon
Procyon lotor
4,031 observations
Eastern Fox Squirrel
Sciurus niger
3,538 observations
Coyote
Canis latrans
2,397 observations
Virginia Opossum
Didelphis virginiana
2,230 observations
Muskrat
Ondatra zibethicus
1,986 observations
American Beaver
Castor canadensis
1,514 observations
Groundhog
Marmota monax
1,490 observations
Red Fox
Vulpes vulpes
958 observations
Domestic Cat
Felis catus
948 observations
Striped Skunk
Mephitis mephitis
720 observations
Northern Short-tailed Shrew
Blarina brevicauda
589 observations
Thirteen-lined Ground Squirrel
Ictidomys tridecemlineatus
540 observations
American Mink
Neogale vison
500 observations
Brown Rat
Rattus norvegicus
353 observations
Mexican Long-nosed Armadillo
Dasypus mexicanus
304 observations
Eastern Red Bat
Lasiurus borealis
291 observations
Silver-haired Bat
Lasionycteris noctivagans
254 observations
Big Brown Bat
Eptesicus fuscus
210 observations
Eastern Mole
Scalopus aquaticus
200 observations
Southern Flying Squirrel
Glaucomys volans
167 observations
Western Meadow Vole
Microtus drummondii
133 observations
Bobcat
Lynx rufus
132 observations
American Bison
Bos bison
127 observations
North American River Otter
Lontra canadensis
114 observations
House Mouse
Mus musculus
112 observations
Plains Pocket Gopher
Geomys bursarius
107 observations
White-footed Mouse
Peromyscus leucopus
102 observations
American Red Squirrel
Tamiasciurus hudsonicus
84 observations
Masked Shrew
Sorex cinereus
74 observations
Eastern Deermouse
Peromyscus maniculatus
65 observations
Northern Hoary Bat
Lasiurus cinereus
47 observations
American Badger
Taxidea taxus
46 observations
Tri-coloured Bat
Perimyotis subflavus
44 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
37 observations
Long-tailed Weasel
Neogale frenata
37 observations
Domestic Dog
Canis familiaris
36 observations
Woodland Vole
Microtus pinetorum
27 observations
American Ermine
Mustela richardsonii
25 observations
Least Weasel
Mustela nivalis
18 observations
European Rabbit
Oryctolagus cuniculus
15 observations
Prairie Vole
Microtus ochrogaster
15 observations
Swamp Rabbit
Sylvilagus aquaticus
11 observations
Gray Fox
Urocyon cinereoargenteus
10 observations
North American Least Shrew
Cryptotis parvus
10 observations
Little Brown Bat
Myotis lucifugus
9 observations
Wild Boar
Sus scrofa
9 observations
Frequently Asked Questions
- The 10 most common mammals in Illinois are:
- Eastern Gray Squirrel (Sciurus carolinensis)
- White-tailed Deer (Odocoileus virginianus)
- Eastern Cottontail (Sylvilagus floridanus)
- Eastern Chipmunk (Tamias striatus)
- Common Raccoon (Procyon lotor)
- Eastern Fox Squirrel (Sciurus niger)
- Coyote (Canis latrans)
- Virginia Opossum (Didelphis virginiana)
- Muskrat (Ondatra zibethicus)
- American Beaver (Castor canadensis)
- The most observed mammal in Illinois is Eastern Gray Squirrel (Sciurus carolinensis), with 14,142 recorded observations.