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White-tailed Deer
Odocoileus virginianus
21,762 observations
Eastern Gray Squirrel
Sciurus carolinensis
14,885 observations
Eastern Cottontail
Sylvilagus floridanus
8,800 observations
Eastern Chipmunk
Tamias striatus
6,251 observations
Groundhog
Marmota monax
4,979 observations
Common Raccoon
Procyon lotor
3,871 observations
Red Fox
Vulpes vulpes
3,629 observations
Domestic Cat
Felis catus
1,887 observations
American Beaver
Castor canadensis
1,864 observations
American Red Squirrel
Tamiasciurus hudsonicus
1,640 observations
Virginia Opossum
Didelphis virginiana
1,402 observations
American Black Bear
Ursus americanus
1,376 observations
Northern Short-tailed Shrew
Blarina brevicauda
1,307 observations
Eastern Fox Squirrel
Sciurus niger
1,150 observations
North American Porcupine
Erethizon dorsatum
1,129 observations
Striped Skunk
Mephitis mephitis
799 observations
Muskrat
Ondatra zibethicus
733 observations
Coyote
Canis latrans
644 observations
American Mink
Neogale vison
642 observations
Wapiti
Cervus canadensis
593 observations
Big Brown Bat
Eptesicus fuscus
498 observations
Eastern Meadow Vole
Microtus pennsylvanicus
351 observations
Brown Rat
Rattus norvegicus
306 observations
Gray Fox
Urocyon cinereoargenteus
279 observations
Southern Flying Squirrel
Glaucomys volans
252 observations
White-footed Mouse
Peromyscus leucopus
234 observations
Fisher
Pekania pennanti
208 observations
Bobcat
Lynx rufus
200 observations
House Mouse
Mus musculus
193 observations
Eastern Red Bat
Lasiurus borealis
189 observations
North American River Otter
Lontra canadensis
135 observations
Hairy-tailed Mole
Parascalops breweri
119 observations
Star-nosed Mole
Condylura cristata
108 observations
Silver-haired Bat
Lasionycteris noctivagans
57 observations
Masked Shrew
Sorex cinereus
57 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
49 observations
Long-tailed Weasel
Neogale frenata
40 observations
Tri-coloured Bat
Perimyotis subflavus
38 observations
Southern Red-backed Vole
Clethrionomys gapperi
38 observations
Woodland Vole
Microtus pinetorum
33 observations
Eastern Mole
Scalopus aquaticus
31 observations
American Ermine
Mustela richardsonii
28 observations
Little Brown Bat
Myotis lucifugus
27 observations
Eastern Woodland Jumping Mouse
Napaeozapus insignis
27 observations
Domestic Dog
Canis familiaris
27 observations
European Rabbit
Oryctolagus cuniculus
20 observations
Eastern Deer Mouse
Peromyscus maniculatus
19 observations
Allegheny Woodrat
Neotoma magister
16 observations
Northern Hoary Bat
Lasiurus cinereus
15 observations
Snowshoe Hare
Lepus americanus
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)
- 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 21,762 recorded observations.