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Eastern Gray Squirrel
Sciurus carolinensis
19,389 observations
Eastern Cottontail
Sylvilagus floridanus
15,299 observations
White-tailed Deer
Odocoileus virginianus
8,964 observations
Eastern Chipmunk
Tamias striatus
6,797 observations
Common Raccoon
Procyon lotor
3,477 observations
American Beaver
Castor canadensis
2,968 observations
Coyote
Canis latrans
2,963 observations
American Red Squirrel
Tamiasciurus hudsonicus
2,461 observations
Red Fox
Vulpes vulpes
2,033 observations
Grey Seal
Halichoerus grypus
2,015 observations
Groundhog
Marmota monax
1,950 observations
Muskrat
Ondatra zibethicus
1,628 observations
Virginia Opossum
Didelphis virginiana
1,056 observations
Striped Skunk
Mephitis mephitis
1,012 observations
North American Porcupine
Erethizon dorsatum
970 observations
American Black Bear
Ursus americanus
873 observations
Harbor Seal
Phoca vitulina
861 observations
Northern Short-tailed Shrew
Blarina brevicauda
795 observations
Humpback Whale
Megaptera novaeangliae
715 observations
North American River Otter
Lontra canadensis
660 observations
Bobcat
Lynx rufus
654 observations
Brown Rat
Rattus norvegicus
651 observations
White-footed Mouse
Peromyscus leucopus
645 observations
Fisher
Pekania pennanti
631 observations
Gray Fox
Urocyon cinereoargenteus
505 observations
Eastern Meadow Vole
Microtus pennsylvanicus
394 observations
Moose
Alces alces
352 observations
American Mink
Neogale vison
338 observations
Domestic Cat
Felis catus
285 observations
Big Brown Bat
Eptesicus fuscus
255 observations
North Atlantic Right Whale
Eubalaena glacialis
191 observations
Long-tailed Weasel
Neogale frenata
188 observations
Southern Flying Squirrel
Glaucomys volans
177 observations
House Mouse
Mus musculus
166 observations
Fin Whale
Balaenoptera physalus
158 observations
American Ermine
Mustela richardsonii
158 observations
Common Dolphin
Delphinus delphis
142 observations
Hairy-tailed Mole
Parascalops breweri
88 observations
Common Minke Whale
Balaenoptera acutorostrata
86 observations
Atlantic White-sided Dolphin
Leucopleurus acutus
85 observations
Star-nosed Mole
Condylura cristata
82 observations
Harp Seal
Pagophilus groenlandicus
58 observations
Masked Shrew
Sorex cinereus
53 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
48 observations
Harbour Porpoise
Phocoena phocoena
47 observations
Eastern Red Bat
Lasiurus borealis
44 observations
Woodland Vole
Microtus pinetorum
32 observations
Southern Red-backed Vole
Clethrionomys gapperi
27 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 19,389 recorded observations.