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White-tailed Deer
Odocoileus virginianus
21,013 observations
Eastern Gray Squirrel
Sciurus carolinensis
14,029 observations
Eastern Cottontail
Sylvilagus floridanus
8,513 observations
Eastern Chipmunk
Tamias striatus
6,044 observations
Groundhog
Marmota monax
4,823 observations
Common Raccoon
Procyon lotor
3,770 observations
Red Fox
Vulpes vulpes
3,558 observations
American Beaver
Castor canadensis
1,828 observations
Domestic Cat
Felis catus
1,793 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,587 observations
Virginia Opossum
Didelphis virginiana
1,360 observations
American Black Bear
Ursus americanus
1,347 observations
Northern Short-tailed Shrew
Blarina brevicauda
1,250 observations
North American Porcupine
Erethizon dorsatum
1,111 observations
Eastern Fox Squirrel
Sciurus niger
1,111 observations
Striped Skunk
Mephitis mephitis
778 observations
Muskrat
Ondatra zibethicus
730 observations
American Mink
Neogale vison
631 observations
Coyote
Canis latrans
627 observations
Wapiti
Cervus canadensis
570 observations
Big Brown Bat
Eptesicus fuscus
489 observations
White-footed Mouse
Peromyscus leucopus
338 observations
Eastern Meadow Vole
Microtus pennsylvanicus
334 observations
Brown Rat
Rattus norvegicus
292 observations
Gray Fox
Urocyon cinereoargenteus
272 observations
Southern Flying Squirrel
Glaucomys volans
242 observations
Fisher
Pekania pennanti
204 observations
Bobcat
Lynx rufus
196 observations
House Mouse
Mus musculus
188 observations
Eastern Red Bat
Lasiurus borealis
183 observations
North American River Otter
Lontra canadensis
133 observations
Hairy-tailed Mole
Parascalops breweri
116 observations
Star-nosed Mole
Condylura cristata
107 observations
Eastern Deermouse
Peromyscus maniculatus
69 observations
Silver-haired Bat
Lasionycteris noctivagans
54 observations
Masked Shrew
Sorex cinereus
54 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
48 observations
Long-tailed Weasel
Neogale frenata
40 observations
Southern Red-backed Vole
Clethrionomys gapperi
38 observations
Tri-coloured Bat
Perimyotis subflavus
37 observations
Woodland Vole
Microtus pinetorum
32 observations
Eastern Mole
Scalopus aquaticus
29 observations
Eastern Woodland Jumping Mouse
Napaeozapus insignis
27 observations
American Ermine
Mustela richardsonii
27 observations
Domestic Dog
Canis familiaris
26 observations
Little Brown Bat
Myotis lucifugus
23 observations
European Rabbit
Oryctolagus cuniculus
20 observations
Northern Hoary Bat
Lasiurus cinereus
15 observations
Allegheny Woodrat
Neotoma magister
15 observations
Northern Flying Squirrel
Glaucomys sabrinus
13 observations
Frequently Asked Questions
- The 10 most common mammals in Pennsylvania are:
- White-tailed Deer (Odocoileus virginianus)
- Eastern Gray Squirrel (Sciurus carolinensis)
- Eastern Cottontail (Sylvilagus floridanus)
- Eastern Chipmunk (Tamias striatus)
- Groundhog (Marmota monax)
- Common Raccoon (Procyon lotor)
- Red Fox (Vulpes vulpes)
- American Beaver (Castor canadensis)
- Domestic Cat (Felis catus)
- American Red Squirrel (Tamiasciurus hudsonicus)
- The most observed mammal in Pennsylvania is White-tailed Deer (Odocoileus virginianus), with 21,013 recorded observations.