Mammals. A total of 25 species of mammals have been recorded from GWMP. These include five species of bats, Big Brown Bat (Eptesicus fuscus), Eastern Pipistrelle (Pipistrellus subflavus), Little Brown Myotis (Myotis lucifugus), Silver-haired bat (Lasionycteris noctivagans) and Eastern Red Bat (Lasiurus borealis). Other mammals known to occur within GWMP are White-footed Mouse (Peromyscus leucopus), House Mouse (Mus musculus), Eastern Mole (Scalopus aquaticus), Northern Short-tailed Shrew (Blarina brevicauda), Southeastern Shrew (Sorex longirostris), Pine Vole (Microtus pinetorum), Norway Rat (Rattus norvegicus), Muskrat (Ondatra zibethica), Beaver (Castor canadensis), Eastern Chipmunk (Tamias striatus), Opossum (Didelphis marsupialis), Eastern Cottontail (Sylvilagusfloridanus), Eastern Gray Squirrel (Sciurus carolinensis), Raccoon (Procyon lotor), Red Fox (Vulpes fulva), Gray Fox (Urocyon cinereoargenteus), Striped Skunk (Mephitis mephitis), Domestic Cat (Felis cattus), and Whitetail Deer (Odocoileus virginianus). The Allegheny Woodrat (Neotoma magister) was historically collected in Great Falls Park (1949), Turkey Run Park (1917), and Dyke Marsh (1897), but recent search effort (1998) did not reveal the presence of this species and it is believed to be extirpated within GWMP. The George Washington Memorial Parkway is home to forty species of mollusks: twenty-seven species of terrestrial snails and slugs, five species of aquatic gastropods, and eight species of freshwater mussels. This list includes rare species such as the fine-ribbed striate, and the Appalachian springsnail.
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