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Mammals of Maryland

The mammals most often spotted in Maryland, ranked by recent research-grade observations.

134,407
recent observations
50
species listed
50
mammals

Naturalists have logged 134,407 research-grade observations across the 50 most-recorded species in Maryland. The most frequently seen is the White-tailed Deer, with 36,717 recorded sightings.

Rarer finds confirmed in Maryland include Bobcat and Fisher - uncommon enough that a sighting is worth logging.

BobcatFisher

Most-observed mammals in Maryland

White-tailed Deer
Odocoileus virginianus
36,717 observations
Eastern Gray Squirrel
Sciurus carolinensis
28,482 observations
Red Fox
Vulpes vulpes
12,840 observations
Eastern Cottontail
Sylvilagus floridanus
12,115 observations
Common Raccoon
Procyon lotor
7,341 observations
Eastern Chipmunk
Tamias striatus
4,974 observations
Groundhog
Marmota monax
4,973 observations
American Beaver
Castor canadensis
4,632 observations
Domestic Cat
Felis catus
3,047 observations
Virginia Opossum
Didelphis virginiana
2,301 observations
Muskrat
Ondatra zibethicus
2,238 observations
Domestic Horse
Equus caballus
1,911 observations
Northern Short-tailed Shrew
Blarina brevicauda
1,755 observations
American Black Bear
Ursus americanus
1,127 observations
Coyote
Canis latrans
1,101 observations
North American River Otter
Lontra canadensis
963 observations
Eastern Fox Squirrel
Sciurus niger
926 observations
Sika Deer
Cervus nippon
725 observations
Striped Skunk
Mephitis mephitis
594 observations
Brown Rat
Rattus norvegicus
559 observations
Eastern Red Bat
Lasiurus borealis
508 observations
White-footed Mouse
Peromyscus leucopus
482 observations
Tamanend's Bottlenose Dolphin
Tursiops erebennus
480 observations
Eastern Mole
Scalopus aquaticus
393 observations
American Mink
Neogale vison
369 observations
Southern Flying Squirrel
Glaucomys volans
364 observations
Big Brown Bat
Eptesicus fuscus
327 observations
House Mouse
Mus musculus
323 observations
American Red Squirrel
Tamiasciurus hudsonicus
228 observations
Harbor Seal
Phoca vitulina
169 observations
Grey Seal
Halichoerus grypus
164 observations
Silver-haired Bat
Lasionycteris noctivagans
156 observations
Gray Fox
Urocyon cinereoargenteus
144 observations
Bobcat
Lynx rufus
135 observations
Eastern Meadow Vole
Microtus pennsylvanicus
132 observations
North American Porcupine
Erethizon dorsatum
116 observations
North American Least Shrew
Cryptotis parvus
87 observations · iNaturalist
Woodland Vole
Microtus pinetorum
62 observations
Tri-coloured Bat
Perimyotis subflavus
57 observations
Eastern Small-footed Myotis
Myotis leibii
49 observations
Domestic Dog
Canis familiaris
49 observations · iNaturalist
Masked Shrew
Sorex cinereus
48 observations
Eastern Deer Mouse
Peromyscus maniculatus
41 observations
Northern Hoary Bat
Lasiurus cinereus
36 observations
Fisher
Pekania pennanti
32 observations
Appalachian Cottontail
Sylvilagus obscurus
31 observations
European Rabbit
Oryctolagus cuniculus
30 observations
Humpback Whale
Megaptera novaeangliae
25 observations
Hispid Cotton Rat
Sigmodon hispidus
25 observations
Northern Meadow Jumping Mouse
Zapus hudsonius
24 observations

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

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