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Eastern Gray Squirrel
Sciurus carolinensis
18,510 observations
Eastern Cottontail
Sylvilagus floridanus
13,805 observations
White-tailed Deer
Odocoileus virginianus
8,262 observations
Eastern Chipmunk
Tamias striatus
6,117 observations
Common Raccoon
Procyon lotor
3,185 observations
American Beaver
Castor canadensis
2,774 observations
Coyote
Canis latrans
2,768 observations
American Red Squirrel
Tamiasciurus hudsonicus
2,265 observations
Grey Seal
Halichoerus grypus
1,911 observations
Red Fox
Vulpes vulpes
1,887 observations
Groundhog
Marmota monax
1,750 observations
Muskrat
Ondatra zibethicus
1,525 observations
Virginia Opossum
Didelphis virginiana
994 observations
Striped Skunk
Mephitis mephitis
897 observations
North American Porcupine
Erethizon dorsatum
876 observations
Harbor Seal
Phoca vitulina
847 observations
Northern Short-tailed Shrew
Blarina brevicauda
770 observations
American Black Bear
Ursus americanus
765 observations
Humpback Whale
Megaptera novaeangliae
654 observations
White-footed Mouse
Peromyscus leucopus
628 observations
Brown Rat
Rattus norvegicus
616 observations
North American River Otter
Lontra canadensis
613 observations
Fisher
Pekania pennanti
594 observations
Bobcat
Lynx rufus
580 observations
Gray Fox
Urocyon cinereoargenteus
472 observations
Eastern Meadow Vole
Microtus pennsylvanicus
379 observations
Moose
Alces alces
323 observations
American Mink
Neogale vison
315 observations
Domestic Cat
Felis catus
276 observations
Big Brown Bat
Eptesicus fuscus
243 observations
North Atlantic Right Whale
Eubalaena glacialis
191 observations
Southern Flying Squirrel
Glaucomys volans
167 observations
Long-tailed Weasel
Neogale frenata
162 observations
House Mouse
Mus musculus
157 observations
Fin Whale
Balaenoptera physalus
146 observations
Common Dolphin
Delphinus delphis
138 observations
American Ermine
Mustela richardsonii
135 observations
Hairy-tailed Mole
Parascalops breweri
83 observations
Atlantic White-sided Dolphin
Leucopleurus acutus
83 observations
Common Minke Whale
Balaenoptera acutorostrata
82 observations
Star-nosed Mole
Condylura cristata
78 observations
Harp Seal
Pagophilus groenlandicus
56 observations
Masked Shrew
Sorex cinereus
52 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
47 observations
Eastern Red Bat
Lasiurus borealis
44 observations
Harbour Porpoise
Phocoena phocoena
41 observations
Woodland Vole
Microtus pinetorum
24 observations
Southern Red-backed Vole
Clethrionomys gapperi
24 observations
Silver-haired Bat
Lasionycteris noctivagans
19 observations
Sei Whale
Balaenoptera borealis
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 18,510 recorded observations.