Mammals of Boston, Massachusetts
The mammals most often spotted near Boston, ranked by recent research-grade observations.
Most-observed mammals near Boston
Eastern Gray Squirrel
Sciurus carolinensis
13,591 observations
Eastern Cottontail
Sylvilagus floridanus
10,508 observations
White-tailed Deer
Odocoileus virginianus
4,440 observations
Eastern Chipmunk
Tamias striatus
3,937 observations
Common Raccoon
Procyon lotor
1,988 observations
Coyote
Canis latrans
1,437 observations
American Beaver
Castor canadensis
1,259 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,083 observations
Muskrat
Ondatra zibethicus
978 observations
Groundhog
Marmota monax
910 observations
Red Fox
Vulpes vulpes
662 observations
Brown Rat
Rattus norvegicus
528 observations
Virginia Opossum
Didelphis virginiana
459 observations
Northern Short-tailed Shrew
Blarina brevicauda
380 observations
Striped Skunk
Mephitis mephitis
359 observations
White-footed Mouse
Peromyscus leucopus
325 observations
Fisher
Pekania pennanti
312 observations
Harbor Seal
Phoca vitulina
184 observations
Gray Fox
Urocyon cinereoargenteus
184 observations
North American River Otter
Lontra canadensis
179 observations
Bobcat
Lynx rufus
169 observations
House Mouse
Mus musculus
153 observations
Big Brown Bat
Eptesicus fuscus
136 observations
American Mink
Neogale vison
135 observations
Eastern Meadow Vole
Microtus pennsylvanicus
132 observations
Domestic Cat
Felis catus
100 observations
Humpback Whale
Megaptera novaeangliae
98 observations
Long-tailed Weasel
Neogale frenata
87 observations · iNaturalist
Grey Seal
Halichoerus grypus
78 observations
Southern Flying Squirrel
Glaucomys volans
75 observations
American Ermine
Mustela richardsonii
56 observations · iNaturalist
Star-nosed Mole
Condylura cristata
36 observations
American Black Bear
Ursus americanus
34 observations
Hairy-tailed Mole
Parascalops breweri
28 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
19 observations
Eastern Red Bat
Lasiurus borealis
18 observations
North American Porcupine
Erethizon dorsatum
17 observations
North Atlantic Right Whale
Eubalaena glacialis
15 observations
Atlantic White-sided Dolphin
Leucopleurus acutus
13 observations · iNaturalist
Masked Shrew
Sorex cinereus
11 observations
Harp Seal
Pagophilus groenlandicus
10 observations · iNaturalist
Harbour Porpoise
Phocoena phocoena
8 observations
Common Minke Whale
Balaenoptera acutorostrata
7 observations
Fin Whale
Balaenoptera physalus
7 observations
Woodland Vole
Microtus pinetorum
7 observations
Southern Red-backed Vole
Clethrionomys gapperi
7 observations · iNaturalist
Silver-haired Bat
Lasionycteris noctivagans
6 observations
New England Cottontail
Sylvilagus transitionalis
5 observations
Common Dolphin
Delphinus delphis
4 observations
Moose
Alces alces
4 observations