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Eastern Gray Squirrel
Sciurus carolinensis
19,671 observations
Eastern Cottontail
Sylvilagus floridanus
15,746 observations
White-tailed Deer
Odocoileus virginianus
9,326 observations
Eastern Chipmunk
Tamias striatus
6,958 observations
Common Raccoon
Procyon lotor
3,584 observations
American Beaver
Castor canadensis
3,048 observations
Coyote
Canis latrans
3,044 observations
American Red Squirrel
Tamiasciurus hudsonicus
2,520 observations
Grey Seal
Halichoerus grypus
2,127 observations
Red Fox
Vulpes vulpes
2,090 observations
Groundhog
Marmota monax
2,029 observations
Muskrat
Ondatra zibethicus
1,643 observations
Virginia Opossum
Didelphis virginiana
1,091 observations
North American Porcupine
Erethizon dorsatum
1,084 observations
Striped Skunk
Mephitis mephitis
1,067 observations
American Black Bear
Ursus americanus
916 observations
Harbor Seal
Phoca vitulina
875 observations
Northern Short-tailed Shrew
Blarina brevicauda
813 observations
Humpback Whale
Megaptera novaeangliae
761 observations
North American River Otter
Lontra canadensis
684 observations
Bobcat
Lynx rufus
679 observations
Brown Rat
Rattus norvegicus
663 observations
White-footed Mouse
Peromyscus leucopus
662 observations
Fisher
Pekania pennanti
638 observations
Gray Fox
Urocyon cinereoargenteus
552 observations
Eastern Meadow Vole
Microtus pennsylvanicus
408 observations
Moose
Alces alces
358 observations
American Mink
Neogale vison
350 observations
Domestic Cat
Felis catus
302 observations
Big Brown Bat
Eptesicus fuscus
260 observations
North Atlantic Right Whale
Eubalaena glacialis
191 observations
Long-tailed Weasel
Neogale frenata
190 observations
Southern Flying Squirrel
Glaucomys volans
179 observations
House Mouse
Mus musculus
165 observations
American Ermine
Mustela richardsonii
164 observations
Fin Whale
Balaenoptera physalus
161 observations
Common Dolphin
Delphinus delphis
143 observations
Hairy-tailed Mole
Parascalops breweri
91 observations
Common Minke Whale
Balaenoptera acutorostrata
90 observations
Atlantic White-sided Dolphin
Leucopleurus acutus
90 observations
Star-nosed Mole
Condylura cristata
84 observations
Harp Seal
Pagophilus groenlandicus
59 observations
Masked Shrew
Sorex cinereus
54 observations
Eastern Red Bat
Lasiurus borealis
48 observations
Harbour Porpoise
Phocoena phocoena
48 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
48 observations
Woodland Vole
Microtus pinetorum
32 observations
Southern Red-backed Vole
Clethrionomys gapperi
30 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)
- Grey Seal (Halichoerus grypus)
- Red Fox (Vulpes vulpes)
- The most observed mammal in Massachusetts is Eastern Gray Squirrel (Sciurus carolinensis), with 19,671 recorded observations.