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White-tailed Deer
Odocoileus virginianus
1,436 observations
Red Fox
Vulpes vulpes
1,355 observations
Eastern Gray Squirrel
Sciurus carolinensis
977 observations
Eastern Cottontail
Sylvilagus floridanus
906 observations
Common Raccoon
Procyon lotor
422 observations
Muskrat
Ondatra zibethicus
237 observations
Groundhog
Marmota monax
235 observations
Tamanend's Bottlenose Dolphin
Tursiops erebennus
206 observations
American Beaver
Castor canadensis
201 observations
Eastern Chipmunk
Tamias striatus
189 observations
Northern Short-tailed Shrew
Blarina brevicauda
147 observations
Grey Seal
Halichoerus grypus
138 observations
Harbor Seal
Phoca vitulina
119 observations
Virginia Opossum
Didelphis virginiana
118 observations
Striped Skunk
Mephitis mephitis
57 observations
Coyote
Canis latrans
54 observations
North American River Otter
Lontra canadensis
52 observations
White-footed Mouse
Peromyscus leucopus
46 observations
Domestic Cat
Felis catus
38 observations
American Red Squirrel
Tamiasciurus hudsonicus
36 observations
Eastern Red Bat
Lasiurus borealis
30 observations
Brown Rat
Rattus norvegicus
25 observations
Southern Flying Squirrel
Glaucomys volans
23 observations
American Mink
Neogale vison
21 observations
House Mouse
Mus musculus
19 observations
Eastern Mole
Scalopus aquaticus
16 observations
Eastern Meadow Vole
Microtus pennsylvanicus
15 observations
Big Brown Bat
Eptesicus fuscus
14 observations
Humpback Whale
Megaptera novaeangliae
12 observations
Gray Fox
Urocyon cinereoargenteus
11 observations
Masked Shrew
Sorex cinereus
9 observations
North American Least Shrew
Cryptotis parvus
8 observations
Silver-haired Bat
Lasionycteris noctivagans
6 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
4 observations
Woodland Vole
Microtus pinetorum
4 observations
Fin Whale
Balaenoptera physalus
2 observations
Harp Seal
Pagophilus groenlandicus
2 observations
Star-nosed Mole
Condylura cristata
2 observations
Common Dolphin
Delphinus delphis
1 observations
Sika Deer
Cervus nippon
1 observations
Eastern Fox Squirrel
Sciurus niger
1 observations
Domestic Cattle
Bos taurus
1 observations
Long-tailed Weasel
Neogale frenata
1 observations
Frequently Asked Questions
- The 10 most common mammals in Delaware are:
- White-tailed Deer (Odocoileus virginianus)
- Red Fox (Vulpes vulpes)
- Eastern Gray Squirrel (Sciurus carolinensis)
- Eastern Cottontail (Sylvilagus floridanus)
- Common Raccoon (Procyon lotor)
- Muskrat (Ondatra zibethicus)
- Groundhog (Marmota monax)
- Tamanend's Bottlenose Dolphin (Tursiops erebennus)
- American Beaver (Castor canadensis)
- Eastern Chipmunk (Tamias striatus)
- The most observed mammal in Delaware is White-tailed Deer (Odocoileus virginianus), with 1,436 recorded observations.