Mammals of Boston, Massachusetts
The mammals most often spotted near Boston, ranked by recent research-grade observations.
46,623
recent observations
50
species listed
50
mammals
Naturalists have logged 46,623 research-grade observations across the 50 most-recorded species near Boston. The most frequently seen is the Eastern Gray Squirrel, with 13,819 recorded sightings.
Rarer finds confirmed near Boston include Fisher, Bobcat and North Atlantic Right Whale - uncommon enough that a sighting is worth logging.
Most-observed mammals near Boston
Eastern Gray Squirrel
Sciurus carolinensis
13,819 observations
Eastern Cottontail
Sylvilagus floridanus
10,955 observations
White-tailed Deer
Odocoileus virginianus
4,645 observations
Eastern Chipmunk
Tamias striatus
4,091 observations
Common Raccoon
Procyon lotor
2,049 observations
Coyote
Canis latrans
1,482 observations
American Beaver
Castor canadensis
1,300 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,115 observations
Muskrat
Ondatra zibethicus
996 observations
Groundhog
Marmota monax
958 observations
Red Fox
Vulpes vulpes
674 observations
Brown Rat
Rattus norvegicus
550 observations
Virginia Opossum
Didelphis virginiana
472 observations
Northern Short-tailed Shrew
Blarina brevicauda
384 observations
Striped Skunk
Mephitis mephitis
377 observations
White-footed Mouse
Peromyscus leucopus
339 observations
Fisher
Pekania pennanti
320 observations
Gray Fox
Urocyon cinereoargenteus
187 observations
North American River Otter
Lontra canadensis
186 observations
Harbor Seal
Phoca vitulina
185 observations
Bobcat
Lynx rufus
176 observations
House Mouse
Mus musculus
155 observations
American Mink
Neogale vison
143 observations
Eastern Meadow Vole
Microtus pennsylvanicus
138 observations
Big Brown Bat
Eptesicus fuscus
137 observations
Humpback Whale
Megaptera novaeangliae
106 observations
Domestic Cat
Felis catus
100 observations
Long-tailed Weasel
Neogale frenata
91 observations · iNaturalist
Grey Seal
Halichoerus grypus
84 observations
Southern Flying Squirrel
Glaucomys volans
76 observations
American Ermine
Mustela richardsonii
63 observations
American Black Bear
Ursus americanus
40 observations
Star-nosed Mole
Condylura cristata
38 observations
Hairy-tailed Mole
Parascalops breweri
29 observations
Eastern Red Bat
Lasiurus borealis
19 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
19 observations
North American Porcupine
Erethizon dorsatum
18 observations
North Atlantic Right Whale
Eubalaena glacialis
15 observations
Atlantic White-sided Dolphin
Leucopleurus acutus
13 observations · iNaturalist
Masked Shrew
Sorex cinereus
12 observations
Harp Seal
Pagophilus groenlandicus
10 observations
Harbour Porpoise
Phocoena phocoena
9 observations
Southern Red-backed Vole
Clethrionomys gapperi
8 observations · iNaturalist
Common Minke Whale
Balaenoptera acutorostrata
7 observations
Fin Whale
Balaenoptera physalus
7 observations
Woodland Vole
Microtus pinetorum
7 observations
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
Mammals in nearby places
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