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White-tailed Deer
Odocoileus virginianus
3,727 observations
Eastern Gray Squirrel
Sciurus carolinensis
3,553 observations
Eastern Cottontail
Sylvilagus floridanus
2,181 observations
Bobcat
Lynx rufus
1,750 observations
Eastern Chipmunk
Tamias striatus
1,435 observations
Red Fox
Vulpes vulpes
1,350 observations
Common Raccoon
Procyon lotor
1,131 observations
Coyote
Canis latrans
1,120 observations
American Black Bear
Ursus americanus
1,009 observations
Groundhog
Marmota monax
923 observations
Virginia Opossum
Didelphis virginiana
849 observations
American Beaver
Castor canadensis
641 observations
American Red Squirrel
Tamiasciurus hudsonicus
505 observations
Striped Skunk
Mephitis mephitis
370 observations
Northern Short-tailed Shrew
Blarina brevicauda
220 observations
Muskrat
Ondatra zibethicus
194 observations
White-footed Mouse
Peromyscus leucopus
176 observations
North American Porcupine
Erethizon dorsatum
167 observations
Domestic Cat
Felis catus
164 observations
Gray Fox
Urocyon cinereoargenteus
147 observations
American Mink
Neogale vison
124 observations
Big Brown Bat
Eptesicus fuscus
104 observations
Eastern Meadow Vole
Microtus pennsylvanicus
91 observations
Southern Flying Squirrel
Glaucomys volans
89 observations
Brown Rat
Rattus norvegicus
87 observations
Harbor Seal
Phoca vitulina
86 observations
North American River Otter
Lontra canadensis
67 observations
Moose
Alces alces
50 observations
Eastern Mole
Scalopus aquaticus
44 observations
Long-tailed Weasel
Neogale frenata
41 observations
Fisher
Pekania pennanti
40 observations
Eastern Red Bat
Lasiurus borealis
33 observations
Grey Seal
Halichoerus grypus
26 observations
American Ermine
Mustela richardsonii
26 observations
Masked Shrew
Sorex cinereus
22 observations
House Mouse
Mus musculus
18 observations
Star-nosed Mole
Condylura cristata
17 observations
Woodland Vole
Microtus pinetorum
14 observations
Hairy-tailed Mole
Parascalops breweri
12 observations
Silver-haired Bat
Lasionycteris noctivagans
10 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 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
Wild Boar
Sus scrofa
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 3,727 recorded observations.
- Some of the most commonly observed native mammals in Connecticut include:
- Smoky Shrew (Sorex fumeus)