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Eastern Gray Squirrel
Sciurus carolinensis
3,964 observations
White-tailed Deer
Odocoileus virginianus
3,887 observations
Eastern Cottontail
Sylvilagus floridanus
2,233 observations
Bobcat
Lynx rufus
1,790 observations
Eastern Chipmunk
Tamias striatus
1,566 observations
Red Fox
Vulpes vulpes
1,379 observations
Common Raccoon
Procyon lotor
1,177 observations
Coyote
Canis latrans
1,156 observations
American Black Bear
Ursus americanus
1,043 observations
Groundhog
Marmota monax
952 observations
Virginia Opossum
Didelphis virginiana
878 observations
American Beaver
Castor canadensis
649 observations
American Red Squirrel
Tamiasciurus hudsonicus
526 observations
Striped Skunk
Mephitis mephitis
401 observations
Northern Short-tailed Shrew
Blarina brevicauda
231 observations
Muskrat
Ondatra zibethicus
196 observations
White-footed Mouse
Peromyscus leucopus
176 observations
North American Porcupine
Erethizon dorsatum
174 observations
Domestic Cat
Felis catus
172 observations
Gray Fox
Urocyon cinereoargenteus
148 observations
American Mink
Neogale vison
126 observations
Big Brown Bat
Eptesicus fuscus
106 observations
Eastern Meadow Vole
Microtus pennsylvanicus
93 observations
Brown Rat
Rattus norvegicus
90 observations
Southern Flying Squirrel
Glaucomys volans
90 observations
Harbor Seal
Phoca vitulina
88 observations
North American River Otter
Lontra canadensis
70 observations
Moose
Alces alces
50 observations
Eastern Mole
Scalopus aquaticus
47 observations
Long-tailed Weasel
Neogale frenata
42 observations
Fisher
Pekania pennanti
41 observations
Eastern Red Bat
Lasiurus borealis
34 observations
Grey Seal
Halichoerus grypus
26 observations
American Ermine
Mustela richardsonii
26 observations
Masked Shrew
Sorex cinereus
22 observations
House Mouse
Mus musculus
19 observations
Star-nosed Mole
Condylura cristata
18 observations
Woodland Vole
Microtus pinetorum
14 observations
Hairy-tailed Mole
Parascalops breweri
12 observations
Silver-haired Bat
Lasionycteris noctivagans
11 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
9 observations
Domestic Dog
Canis familiaris
8 observations
Harp Seal
Pagophilus groenlandicus
5 observations
Eastern Woodland Jumping Mouse
Napaeozapus insignis
5 observations
Eastern Deer Mouse
Peromyscus maniculatus
5 observations
Smoky Shrew
Sorex fumeus
5 observations
Southern Red-backed Vole
Clethrionomys gapperi
4 observations
Little Brown Bat
Myotis lucifugus
3 observations
Northern Hoary Bat
Lasiurus cinereus
3 observations
Wild Boar
Sus scrofa
3 observations
Frequently Asked Questions
- The 10 most common mammals in Connecticut are:
- Eastern Gray Squirrel (Sciurus carolinensis)
- White-tailed Deer (Odocoileus virginianus)
- Eastern Cottontail (Sylvilagus floridanus)
- Bobcat (Lynx rufus)
- Eastern Chipmunk (Tamias striatus)
- Red Fox (Vulpes vulpes)
- Common Raccoon (Procyon lotor)
- Coyote (Canis latrans)
- American Black Bear (Ursus americanus)
- Groundhog (Marmota monax)
- The most observed mammal in Connecticut is Eastern Gray Squirrel (Sciurus carolinensis), with 3,964 recorded observations.
- Some of the most commonly observed native mammals in Connecticut include:
- Smoky Shrew (Sorex fumeus)