Mammals of Pennsylvania
The mammals most often spotted in Pennsylvania, ranked by recent research-grade observations.
100,422
recent observations
50
species listed
50
mammals
Naturalists have logged 100,422 research-grade observations across the 50 most-recorded species in Pennsylvania. The most frequently seen is the White-tailed Deer, with 25,093 recorded sightings.
Rarer finds confirmed in Pennsylvania include Fisher and Bobcat - uncommon enough that a sighting is worth logging.
Most-observed mammals in Pennsylvania
White-tailed Deer
Odocoileus virginianus
25,093 observations
Eastern Gray Squirrel
Sciurus carolinensis
17,194 observations
Eastern Cottontail
Sylvilagus floridanus
10,338 observations
Eastern Chipmunk
Tamias striatus
7,797 observations
Groundhog
Marmota monax
6,127 observations
Red Fox
Vulpes vulpes
4,708 observations
Common Raccoon
Procyon lotor
4,683 observations
American Beaver
Castor canadensis
2,798 observations
American Red Squirrel
Tamiasciurus hudsonicus
2,280 observations
Domestic Cat
Felis catus
2,014 observations
American Black Bear
Ursus americanus
1,812 observations
Virginia Opossum
Didelphis virginiana
1,724 observations
Northern Short-tailed Shrew
Blarina brevicauda
1,712 observations
North American Porcupine
Erethizon dorsatum
1,526 observations
Striped Skunk
Mephitis mephitis
1,191 observations
Eastern Fox Squirrel
Sciurus niger
1,110 observations
Muskrat
Ondatra zibethicus
1,056 observations
Coyote
Canis latrans
940 observations
American Mink
Neogale vison
905 observations
Big Brown Bat
Eptesicus fuscus
589 observations
Wapiti
Cervus canadensis
559 observations
Gray Fox
Urocyon cinereoargenteus
412 observations
Eastern Meadow Vole
Microtus pennsylvanicus
404 observations
White-footed Mouse
Peromyscus leucopus
403 observations
Fisher
Pekania pennanti
352 observations
Bobcat
Lynx rufus
350 observations
Brown Rat
Rattus norvegicus
326 observations
Southern Flying Squirrel
Glaucomys volans
302 observations
Eastern Red Bat
Lasiurus borealis
231 observations
House Mouse
Mus musculus
208 observations
North American River Otter
Lontra canadensis
203 observations
Star-nosed Mole
Condylura cristata
172 observations
Hairy-tailed Mole
Parascalops breweri
148 observations
Eastern Deermouse
Peromyscus maniculatus
85 observations
Masked Shrew
Sorex cinereus
73 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
68 observations
Silver-haired Bat
Lasionycteris noctivagans
63 observations
Long-tailed Weasel
Neogale frenata
63 observations · iNaturalist
Eastern Mole
Scalopus aquaticus
60 observations
American Ermine
Mustela richardsonii
49 observations · iNaturalist
Tri-coloured Bat
Perimyotis subflavus
46 observations
Southern Red-backed Vole
Clethrionomys gapperi
45 observations · iNaturalist
Eastern Woodland Jumping Mouse
Napaeozapus insignis
35 observations
Woodland Vole
Microtus pinetorum
34 observations
Domestic Dog
Canis familiaris
31 observations · iNaturalist
European Rabbit
Oryctolagus cuniculus
26 observations · iNaturalist
Little Brown Bat
Myotis lucifugus
25 observations
Northern Flying Squirrel
Glaucomys sabrinus
20 observations
Northern Hoary Bat
Lasiurus cinereus
17 observations
Allegheny Woodrat
Neotoma magister
15 observations · iNaturalist
Mammals in nearby places
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