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Mammals of New Jersey

The mammals most often spotted in New Jersey, ranked by recent research-grade observations.

105,517
recent observations
50
species listed
50
mammals

Naturalists have logged 105,517 research-grade observations across the 50 most-recorded species in New Jersey. The most frequently seen is the Eastern Gray Squirrel, with 30,705 recorded sightings.

Rarer finds confirmed in New Jersey include Bobcat and Fisher - uncommon enough that a sighting is worth logging.

BobcatFisher

Most-observed mammals in New Jersey

Eastern Gray Squirrel
Sciurus carolinensis
30,705 observations
White-tailed Deer
Odocoileus virginianus
21,251 observations
Eastern Cottontail
Sylvilagus floridanus
8,856 observations
Eastern Chipmunk
Tamias striatus
6,436 observations
Red Fox
Vulpes vulpes
5,942 observations
Groundhog
Marmota monax
5,726 observations
Common Raccoon
Procyon lotor
5,214 observations
Domestic Cat
Felis catus
2,536 observations
Brown Rat
Rattus norvegicus
2,457 observations
American Black Bear
Ursus americanus
2,292 observations
American Beaver
Castor canadensis
2,250 observations
Northern Short-tailed Shrew
Blarina brevicauda
1,400 observations
Virginia Opossum
Didelphis virginiana
1,383 observations
Striped Skunk
Mephitis mephitis
1,038 observations
Muskrat
Ondatra zibethicus
928 observations
Coyote
Canis latrans
913 observations
Harbor Seal
Phoca vitulina
505 observations
Tamanend's Bottlenose Dolphin
Tursiops erebennus
502 observations
Eastern Red Bat
Lasiurus borealis
500 observations
American Red Squirrel
Tamiasciurus hudsonicus
490 observations
American Mink
Neogale vison
486 observations
White-footed Mouse
Peromyscus leucopus
477 observations
Bobcat
Lynx rufus
405 observations
North American Porcupine
Erethizon dorsatum
333 observations
House Mouse
Mus musculus
326 observations
Big Brown Bat
Eptesicus fuscus
263 observations
Humpback Whale
Megaptera novaeangliae
257 observations
North American River Otter
Lontra canadensis
248 observations
Eastern Meadow Vole
Microtus pennsylvanicus
231 observations
Southern Flying Squirrel
Glaucomys volans
224 observations
Silver-haired Bat
Lasionycteris noctivagans
169 observations
Eastern Mole
Scalopus aquaticus
126 observations
Grey Seal
Halichoerus grypus
124 observations
Gray Fox
Urocyon cinereoargenteus
112 observations
Masked Shrew
Sorex cinereus
69 observations
Star-nosed Mole
Condylura cristata
52 observations
Long-tailed Weasel
Neogale frenata
38 observations · iNaturalist
Woodland Vole
Microtus pinetorum
36 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
32 observations
Northern Hoary Bat
Lasiurus cinereus
25 observations
European Rabbit
Oryctolagus cuniculus
23 observations
Eastern Deer Mouse
Peromyscus maniculatus
22 observations
Common Dolphin
Delphinus delphis
20 observations
Fisher
Pekania pennanti
20 observations
Harp Seal
Pagophilus groenlandicus
19 observations
Common Minke Whale
Balaenoptera acutorostrata
15 observations
Hairy-tailed Mole
Parascalops breweri
12 observations
Tri-coloured Bat
Perimyotis subflavus
10 observations
American Ermine
Mustela richardsonii
10 observations
North American Least Shrew
Cryptotis parvus
9 observations · iNaturalist

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

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