Mammals of Delaware
The mammals most often spotted in Delaware, ranked by recent research-grade observations.
9,380
recent observations
46
species listed
46
mammals
Naturalists have logged 9,380 research-grade observations across the 46 most-recorded species in Delaware. The most frequently seen is the White-tailed Deer, with 1,834 recorded sightings.
Most-observed mammals in Delaware
White-tailed Deer
Odocoileus virginianus
1,834 observations
Red Fox
Vulpes vulpes
1,489 observations
Eastern Gray Squirrel
Sciurus carolinensis
1,314 observations
Eastern Cottontail
Sylvilagus floridanus
1,242 observations
Common Raccoon
Procyon lotor
546 observations
Groundhog
Marmota monax
428 observations
American Beaver
Castor canadensis
374 observations
Muskrat
Ondatra zibethicus
274 observations
Tamanend's Bottlenose Dolphin
Tursiops erebennus
243 observations
Eastern Chipmunk
Tamias striatus
238 observations
Northern Short-tailed Shrew
Blarina brevicauda
200 observations
Virginia Opossum
Didelphis virginiana
169 observations
Grey Seal
Halichoerus grypus
141 observations
Harbor Seal
Phoca vitulina
126 observations
Striped Skunk
Mephitis mephitis
87 observations
North American River Otter
Lontra canadensis
78 observations
Coyote
Canis latrans
71 observations
Domestic Cat
Felis catus
69 observations
White-footed Mouse
Peromyscus leucopus
67 observations
Eastern Red Bat
Lasiurus borealis
43 observations
American Red Squirrel
Tamiasciurus hudsonicus
41 observations
American Mink
Neogale vison
40 observations
Eastern Mole
Scalopus aquaticus
34 observations
Southern Flying Squirrel
Glaucomys volans
31 observations
Brown Rat
Rattus norvegicus
28 observations
Big Brown Bat
Eptesicus fuscus
27 observations
House Mouse
Mus musculus
24 observations
Gray Fox
Urocyon cinereoargenteus
20 observations
Eastern Meadow Vole
Microtus pennsylvanicus
17 observations
Humpback Whale
Megaptera novaeangliae
12 observations
North American Least Shrew
Cryptotis parvus
11 observations · iNaturalist
Silver-haired Bat
Lasionycteris noctivagans
10 observations
Masked Shrew
Sorex cinereus
10 observations
Sika Deer
Cervus nippon
8 observations
Woodland Vole
Microtus pinetorum
7 observations
Star-nosed Mole
Condylura cristata
6 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
5 observations
Domestic Dog
Canis familiaris
4 observations · iNaturalist
American Black Bear
Ursus americanus
3 observations
Harp Seal
Pagophilus groenlandicus
2 observations
Eastern Fox Squirrel
Sciurus niger
2 observations
Common Dolphin
Delphinus delphis
1 observation
Fin Whale
Balaenoptera physalus
1 observation
Domestic Cattle
Bos taurus
1 observation · iNaturalist
Tri-coloured Bat
Perimyotis subflavus
1 observation
Long-tailed Weasel
Neogale frenata
1 observation · iNaturalist
Mammals in nearby places
Out spotting mammals in Delaware?
Take Huck with you. Identify any mammal you find in seconds and build your collection.
Get HuckLove mammals? Get Huck field notes
Spotting tips, new species, and the best of what people are finding in the wild - straight to your inbox.