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Eastern Gray Squirrel
Sciurus carolinensis
19,066 observations
Eastern Cottontail
Sylvilagus floridanus
14,689 observations
White-tailed Deer
Odocoileus virginianus
8,576 observations
Eastern Chipmunk
Tamias striatus
6,477 observations
Common Raccoon
Procyon lotor
3,350 observations
American Beaver
Castor canadensis
2,911 observations
Coyote
Canis latrans
2,838 observations
American Red Squirrel
Tamiasciurus hudsonicus
2,381 observations
Red Fox
Vulpes vulpes
1,968 observations
Grey Seal
Halichoerus grypus
1,946 observations
Groundhog
Marmota monax
1,841 observations
Muskrat
Ondatra zibethicus
1,601 observations
Virginia Opossum
Didelphis virginiana
1,019 observations
Striped Skunk
Mephitis mephitis
923 observations
North American Porcupine
Erethizon dorsatum
923 observations
Harbor Seal
Phoca vitulina
853 observations
American Black Bear
Ursus americanus
824 observations
Northern Short-tailed Shrew
Blarina brevicauda
782 observations
Humpback Whale
Megaptera novaeangliae
681 observations
White-footed Mouse
Peromyscus leucopus
636 observations
North American River Otter
Lontra canadensis
635 observations
Brown Rat
Rattus norvegicus
635 observations
Fisher
Pekania pennanti
617 observations
Bobcat
Lynx rufus
598 observations
Gray Fox
Urocyon cinereoargenteus
488 observations
Eastern Meadow Vole
Microtus pennsylvanicus
385 observations
Moose
Alces alces
335 observations
American Mink
Neogale vison
321 observations
Domestic Cat
Felis catus
281 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
167 observations
House Mouse
Mus musculus
163 observations
American Ermine
Mustela richardsonii
156 observations
Fin Whale
Balaenoptera physalus
148 observations
Common Dolphin
Delphinus delphis
139 observations
Hairy-tailed Mole
Parascalops breweri
87 observations
Common Minke Whale
Balaenoptera acutorostrata
84 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 19,066 recorded observations.