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White-tailed Deer
Odocoileus virginianus
3,450 observations
Eastern Gray Squirrel
Sciurus carolinensis
3,439 observations
Eastern Cottontail
Sylvilagus floridanus
2,006 observations
Bobcat
Lynx rufus
1,678 observations
Eastern Chipmunk
Tamias striatus
1,350 observations
Red Fox
Vulpes vulpes
1,269 observations
Common Raccoon
Procyon lotor
1,083 observations
Coyote
Canis latrans
1,046 observations
American Black Bear
Ursus americanus
901 observations
Groundhog
Marmota monax
852 observations
Virginia Opossum
Didelphis virginiana
819 observations
American Beaver
Castor canadensis
595 observations
American Red Squirrel
Tamiasciurus hudsonicus
482 observations
Striped Skunk
Mephitis mephitis
343 observations
Northern Short-tailed Shrew
Blarina brevicauda
215 observations
Muskrat
Ondatra zibethicus
189 observations
White-footed Mouse
Peromyscus leucopus
171 observations
Domestic Cat
Felis catus
160 observations
North American Porcupine
Erethizon dorsatum
158 observations
Gray Fox
Urocyon cinereoargenteus
141 observations
American Mink
Neogale vison
117 observations
Big Brown Bat
Eptesicus fuscus
102 observations
Eastern Meadow Vole
Microtus pennsylvanicus
90 observations
Brown Rat
Rattus norvegicus
87 observations
Harbor Seal
Phoca vitulina
85 observations
Southern Flying Squirrel
Glaucomys volans
82 observations
North American River Otter
Lontra canadensis
65 observations
Moose
Alces alces
47 observations
Eastern Mole
Scalopus aquaticus
41 observations
Fisher
Pekania pennanti
40 observations
Long-tailed Weasel
Neogale frenata
39 observations
Eastern Red Bat
Lasiurus borealis
27 observations
Grey Seal
Halichoerus grypus
24 observations
American Ermine
Mustela richardsonii
23 observations
Masked Shrew
Sorex cinereus
19 observations
House Mouse
Mus musculus
17 observations
Star-nosed Mole
Condylura cristata
17 observations
Woodland Vole
Microtus pinetorum
12 observations
Hairy-tailed Mole
Parascalops breweri
12 observations
Silver-haired Bat
Lasionycteris noctivagans
9 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
9 observations
Domestic Dog
Canis familiaris
7 observations
Harp Seal
Pagophilus groenlandicus
5 observations
Eastern Woodland Jumping Mouse
Napaeozapus insignis
5 observations
Eastern Deermouse
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
New England Cottontail
Sylvilagus transitionalis
3 observations
Frequently Asked Questions
- The 10 most common mammals in Connecticut are:
- White-tailed Deer (Odocoileus virginianus)
- Eastern Gray Squirrel (Sciurus carolinensis)
- 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 White-tailed Deer (Odocoileus virginianus), with 3,450 recorded observations.
- Some of the most commonly observed native mammals in Connecticut include:
- Smoky Shrew (Sorex fumeus)