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White-tailed Deer
Odocoileus virginianus
3,364 observations
Eastern Gray Squirrel
Sciurus carolinensis
3,356 observations
Eastern Cottontail
Sylvilagus floridanus
1,930 observations
Bobcat
Lynx rufus
1,660 observations
Eastern Chipmunk
Tamias striatus
1,266 observations
Red Fox
Vulpes vulpes
1,201 observations
Common Raccoon
Procyon lotor
1,040 observations
Coyote
Canis latrans
1,002 observations
American Black Bear
Ursus americanus
850 observations
Groundhog
Marmota monax
804 observations
Virginia Opossum
Didelphis virginiana
796 observations
American Beaver
Castor canadensis
562 observations
American Red Squirrel
Tamiasciurus hudsonicus
459 observations
Striped Skunk
Mephitis mephitis
338 observations
Northern Short-tailed Shrew
Blarina brevicauda
212 observations
Muskrat
Ondatra zibethicus
181 observations
White-footed Mouse
Peromyscus leucopus
167 observations
Domestic Cat
Felis catus
157 observations
North American Porcupine
Erethizon dorsatum
147 observations
Gray Fox
Urocyon cinereoargenteus
141 observations
American Mink
Neogale vison
112 observations
Big Brown Bat
Eptesicus fuscus
101 observations
Eastern Meadow Vole
Microtus pennsylvanicus
90 observations
Brown Rat
Rattus norvegicus
87 observations
Harbor Seal
Phoca vitulina
81 observations
Southern Flying Squirrel
Glaucomys volans
80 observations
North American River Otter
Lontra canadensis
65 observations
Moose
Alces alces
47 observations
Eastern Mole
Scalopus aquaticus
41 observations
Long-tailed Weasel
Neogale frenata
38 observations
Fisher
Pekania pennanti
37 observations
Eastern Red Bat
Lasiurus borealis
27 observations
Grey Seal
Halichoerus grypus
24 observations
American Ermine
Mustela richardsonii
21 observations
House Mouse
Mus musculus
17 observations
Star-nosed Mole
Condylura cristata
16 observations
Masked Shrew
Sorex cinereus
15 observations
Woodland Vole
Microtus pinetorum
11 observations
Hairy-tailed Mole
Parascalops breweri
11 observations
Silver-haired Bat
Lasionycteris noctivagans
9 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
9 observations
Domestic Dog
Canis familiaris
7 observations
Eastern Deermouse
Peromyscus maniculatus
6 observations
Harp Seal
Pagophilus groenlandicus
5 observations
Eastern Woodland Jumping Mouse
Napaeozapus insignis
5 observations
Smoky Shrew
Sorex fumeus
4 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 3,364 recorded observations.
- Some of the most commonly observed native mammals in Connecticut include:
- Smoky Shrew (Sorex fumeus)