Mammals of Boston, Massachusetts
The mammals most often spotted near Boston, ranked by recent research-grade observations.
47,261
recent observations
50
species listed
50
mammals
Naturalists have logged 47,261 research-grade observations across the 50 most-recorded species near Boston. The most frequently seen is the Eastern Gray Squirrel, with 13,959 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
13,959 observations
Eastern Cottontail
Sylvilagus floridanus
11,077 observations
White-tailed Deer
Odocoileus virginianus
4,732 observations
Eastern Chipmunk
Tamias striatus
4,145 observations
Common Raccoon
Procyon lotor
2,097 observations
Coyote
Canis latrans
1,523 observations
American Beaver
Castor canadensis
1,308 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,127 observations
Muskrat
Ondatra zibethicus
997 observations
Groundhog
Marmota monax
979 observations
Red Fox
Vulpes vulpes
697 observations
Brown Rat
Rattus norvegicus
560 observations
Virginia Opossum
Didelphis virginiana
484 observations
Northern Short-tailed Shrew
Blarina brevicauda
400 observations
Striped Skunk
Mephitis mephitis
386 observations
White-footed Mouse
Peromyscus leucopus
342 observations
Fisher
Pekania pennanti
325 observations
North American River Otter
Lontra canadensis
192 observations
Gray Fox
Urocyon cinereoargenteus
187 observations
Harbor Seal
Phoca vitulina
186 observations
Bobcat
Lynx rufus
179 observations
House Mouse
Mus musculus
155 observations
American Mink
Neogale vison
144 observations
Eastern Meadow Vole
Microtus pennsylvanicus
142 observations
Big Brown Bat
Eptesicus fuscus
137 observations
Humpback Whale
Megaptera novaeangliae
106 observations
Domestic Cat
Felis catus
101 observations
Long-tailed Weasel
Neogale frenata
96 observations · iNaturalist
Grey Seal
Halichoerus grypus
84 observations
Southern Flying Squirrel
Glaucomys volans
76 observations
American Ermine
Mustela richardsonii
65 observations
American Black Bear
Ursus americanus
41 observations
Star-nosed Mole
Condylura cristata
38 observations
Hairy-tailed Mole
Parascalops breweri
29 observations
Eastern Red Bat
Lasiurus borealis
20 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
19 observations
North American Porcupine
Erethizon dorsatum
18 observations
North Atlantic Right Whale
Eubalaena glacialis
15 observations
Masked Shrew
Sorex cinereus
13 observations
Atlantic White-sided Dolphin
Leucopleurus acutus
13 observations · iNaturalist
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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