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White-tailed Deer
Odocoileus virginianus
1,371 observations
Red Fox
Vulpes vulpes
1,286 observations
Eastern Gray Squirrel
Sciurus carolinensis
951 observations
Eastern Cottontail
Sylvilagus floridanus
867 observations
Common Raccoon
Procyon lotor
394 observations
Muskrat
Ondatra zibethicus
236 observations
Groundhog
Marmota monax
229 observations
American Beaver
Castor canadensis
197 observations
Tamanend's Bottlenose Dolphin
Tursiops erebennus
193 observations
Eastern Chipmunk
Tamias striatus
179 observations
Northern Short-tailed Shrew
Blarina brevicauda
140 observations
Grey Seal
Halichoerus grypus
135 observations
Harbor Seal
Phoca vitulina
117 observations
Virginia Opossum
Didelphis virginiana
112 observations
Striped Skunk
Mephitis mephitis
57 observations
Coyote
Canis latrans
54 observations
North American River Otter
Lontra canadensis
50 observations
White-footed Mouse
Peromyscus leucopus
39 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
21 observations
American Mink
Neogale vison
20 observations
House Mouse
Mus musculus
17 observations
Eastern Mole
Scalopus aquaticus
15 observations
Eastern Meadow Vole
Microtus pennsylvanicus
14 observations
Big Brown Bat
Eptesicus fuscus
12 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
3 observations
Fin Whale
Balaenoptera physalus
2 observations
Harp Seal
Pagophilus groenlandicus
2 observations
Woodland Vole
Microtus pinetorum
2 observations
Common Dolphin
Delphinus delphis
1 observations
Sika Deer
Cervus nippon
1 observations
Eastern Fox Squirrel
Sciurus niger
1 observations
Star-nosed Mole
Condylura cristata
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)
- American Beaver (Castor canadensis)
- Tamanend's Bottlenose Dolphin (Tursiops erebennus)
- Eastern Chipmunk (Tamias striatus)
- The most observed mammal in Delaware is White-tailed Deer (Odocoileus virginianus), with 1,371 recorded observations.