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White-tailed Deer
Odocoileus virginianus
18,493 observations
Eastern Gray Squirrel
Sciurus carolinensis
12,689 observations
Eastern Cottontail
Sylvilagus floridanus
6,804 observations
Eastern Chipmunk
Tamias striatus
5,132 observations
Groundhog
Marmota monax
3,980 observations
Common Raccoon
Procyon lotor
3,270 observations
Red Fox
Vulpes vulpes
3,014 observations
Domestic Cat
Felis catus
1,662 observations
American Beaver
Castor canadensis
1,560 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,344 observations
Virginia Opossum
Didelphis virginiana
1,268 observations
American Black Bear
Ursus americanus
1,184 observations
Northern Short-tailed Shrew
Blarina brevicauda
1,115 observations
North American Porcupine
Erethizon dorsatum
987 observations
Eastern Fox Squirrel
Sciurus niger
962 observations
Striped Skunk
Mephitis mephitis
682 observations
Muskrat
Ondatra zibethicus
672 observations
Coyote
Canis latrans
560 observations
American Mink
Neogale vison
559 observations
Wapiti
Cervus canadensis
529 observations
Big Brown Bat
Eptesicus fuscus
430 observations
Eastern Meadow Vole
Microtus pennsylvanicus
283 observations
White-footed Mouse
Peromyscus leucopus
281 observations
Brown Rat
Rattus norvegicus
256 observations
Gray Fox
Urocyon cinereoargenteus
245 observations
Southern Flying Squirrel
Glaucomys volans
220 observations
Bobcat
Lynx rufus
190 observations
Fisher
Pekania pennanti
190 observations
Eastern Red Bat
Lasiurus borealis
162 observations
House Mouse
Mus musculus
161 observations
North American River Otter
Lontra canadensis
121 observations
Hairy-tailed Mole
Parascalops breweri
106 observations
Star-nosed Mole
Condylura cristata
95 observations
Eastern Deermouse
Peromyscus maniculatus
66 observations
Silver-haired Bat
Lasionycteris noctivagans
52 observations
Masked Shrew
Sorex cinereus
49 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
44 observations
Southern Red-backed Vole
Clethrionomys gapperi
36 observations
Tricolored Bat
Perimyotis subflavus
35 observations
Long-tailed Weasel
Neogale frenata
35 observations
Eastern Woodland Jumping Mouse
Napaeozapus insignis
27 observations
Eastern Mole
Scalopus aquaticus
26 observations
American Ermine
Mustela richardsonii
25 observations
Domestic Dog
Canis familiaris
24 observations
Woodland Vole
Microtus pinetorum
23 observations
Little Brown Bat
Myotis lucifugus
19 observations
European Rabbit
Oryctolagus cuniculus
15 observations
Allegheny Woodrat
Neotoma magister
14 observations
Northern Hoary Bat
Lasiurus cinereus
13 observations
Northern Flying Squirrel
Glaucomys sabrinus
12 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)
- Domestic Cat (Felis catus)
- American Beaver (Castor canadensis)
- American Red Squirrel (Tamiasciurus hudsonicus)
- The most observed mammal in Pennsylvania is White-tailed Deer (Odocoileus virginianus), with 18,493 recorded observations.