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Eastern Gray Squirrel
Sciurus carolinensis
19,127 observations
Eastern Cottontail
Sylvilagus floridanus
14,793 observations
White-tailed Deer
Odocoileus virginianus
8,640 observations
Eastern Chipmunk
Tamias striatus
6,540 observations
Common Raccoon
Procyon lotor
3,368 observations
American Beaver
Castor canadensis
2,919 observations
Coyote
Canis latrans
2,852 observations
American Red Squirrel
Tamiasciurus hudsonicus
2,393 observations
Red Fox
Vulpes vulpes
1,980 observations
Grey Seal
Halichoerus grypus
1,954 observations
Groundhog
Marmota monax
1,859 observations
Muskrat
Ondatra zibethicus
1,604 observations
Virginia Opossum
Didelphis virginiana
1,025 observations
Striped Skunk
Mephitis mephitis
933 observations
North American Porcupine
Erethizon dorsatum
933 observations
Harbor Seal
Phoca vitulina
854 observations
American Black Bear
Ursus americanus
831 observations
Northern Short-tailed Shrew
Blarina brevicauda
783 observations
Humpback Whale
Megaptera novaeangliae
684 observations
North American River Otter
Lontra canadensis
639 observations
White-footed Mouse
Peromyscus leucopus
638 observations
Brown Rat
Rattus norvegicus
634 observations
Fisher
Pekania pennanti
620 observations
Bobcat
Lynx rufus
605 observations
Gray Fox
Urocyon cinereoargenteus
489 observations
Eastern Meadow Vole
Microtus pennsylvanicus
387 observations
Moose
Alces alces
339 observations
American Mink
Neogale vison
325 observations
Domestic Cat
Felis catus
285 observations
Big Brown Bat
Eptesicus fuscus
254 observations
North Atlantic Right Whale
Eubalaena glacialis
191 observations
Southern Flying Squirrel
Glaucomys volans
174 observations
Long-tailed Weasel
Neogale frenata
173 observations
House Mouse
Mus musculus
163 observations
Fin Whale
Balaenoptera physalus
150 observations
American Ermine
Mustela richardsonii
147 observations
Common Dolphin
Delphinus delphis
139 observations
Hairy-tailed Mole
Parascalops breweri
87 observations
Common Minke Whale
Balaenoptera acutorostrata
85 observations
Atlantic White-sided Dolphin
Leucopleurus acutus
84 observations
Star-nosed Mole
Condylura cristata
80 observations
Harp Seal
Pagophilus groenlandicus
56 observations
Masked Shrew
Sorex cinereus
52 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
46 observations
Harbour Porpoise
Phocoena phocoena
45 observations
Eastern Red Bat
Lasiurus borealis
44 observations
Woodland Vole
Microtus pinetorum
27 observations
Southern Red-backed Vole
Clethrionomys gapperi
24 observations
Sei Whale
Balaenoptera borealis
20 observations
Silver-haired Bat
Lasionycteris noctivagans
19 observations
Frequently Asked Questions
- The 10 most common mammals in Massachusetts are:
- Eastern Gray Squirrel (Sciurus carolinensis)
- Eastern Cottontail (Sylvilagus floridanus)
- White-tailed Deer (Odocoileus virginianus)
- Eastern Chipmunk (Tamias striatus)
- Common Raccoon (Procyon lotor)
- American Beaver (Castor canadensis)
- Coyote (Canis latrans)
- American Red Squirrel (Tamiasciurus hudsonicus)
- Red Fox (Vulpes vulpes)
- Grey Seal (Halichoerus grypus)
- The most observed mammal in Massachusetts is Eastern Gray Squirrel (Sciurus carolinensis), with 19,127 recorded observations.