Below is a list of mammals (excluding species that live in the ocean) that have been seen in Olympic National Park. Some of the species below, like river otters and beaver, may spend much of their life in water but den outside of the water. A = Abundant; C = Common; CL = Common locally; U = Uncommon; UL = Uncommon locally; R = Rare;
** Endemic Mammals
Masked shrew, Sorex cinereus - R Trowbridge's shrew, Sorex trowbridgei - C Vagrant shrew, Sorex vagrans - C Montane shrew, Sorex monticolus - C Pacific marsh shrew, Sorex bendirii - C Northern water shrew, Sorex palustris - U Shrew-mole, Neurotrichus gibbsii - CL Townsend’s mole, Scapanus townsendii -A Snow mole, S. townsendii olympicus - UL** Coast mole, Scapanus orarius - C Little brown myotis, Myotis lucifugus - U Yuma myotis, Myotis yumanensis - C Keen's myotis, Myotis keenii - R Long-eared myotis, Myotis evotis - R California myotis, Myotis californicus - U Long-legged myotis, Myotis volans - R Fringed myotis, Myotis thysanodes - U Big brown bat, Eptesicus fuscus - U Silver-haired bat, Lasionycteris noctivagans - U Hoary bat, Lasiurus cinereus - U Townsend's big-eared bat, Corynorhinus townsendii - R Snowshoe hare, Lepus americanus - C Virginia oppossum, Didelphis virginiana - Encroaching Mountain beaver, Aplodontia rufa - C Douglas squirrel, Tamiasciurus douglasii - C Northern flying squirrel, Glaucomys sabrinus - C Townsend’s chipmunk, Tamias townsendii - C Olympic chipmunk, Tamias amoenus caurinus - CL** Beaver, Castor canadensis - CL Muskrat, Ondatra zibethicus - CL Olympic marmot, Marmota olympus - CL** Porcupine, Erethizon dorsatum - R Mazama pocket gopher, T. mazama melanops - U** Keen's mouse, Peromyscus keeni - C Deer mouse, Peromyscus maniculatus - A Bushy-tailed woodrat, Neotoma cinerea - CL Heather vole, Phenacomys intermedius - CL Southern red-backed vole, Clethrionomys gapperi -C Townsend's vole, Microtus townsendii - C Long-tailed vole, Microtus longicaudus - U Creeping vole, Microtus oregoni - CL Pacific jumping mouse, Zapus trinotatus - C Black rat, Rattus rattus - CL (introduced) Norway rat, Rattus norvegicus - CL (introduced) Coyote, Canis latrans - C Wolf, Canis lupus - Extirpated Red fox, Vulpes fulva - R (introduced) Black bear, Ursus americanus - C Raccoon, Procyon lotor - C Marten, Martes americana - R Fisher, Pekania pennanti - R (reintroduced) Short-tailed weasel, Mustela erminea olympica - C** Long-tailed weasel, Mustela frenata - C Mink, Mustela vison - C River otter, Lutra canadensis - C Porcupine, Erethizon dorsatum - R Spotted skunk, Spilogale gracilis - C Striped skunk, Mephitis mephitis - CL Cougar, Puma concolor - C Bobcat, Lynx rufus - C Roosevelt elk, Cervus elaphus roosevelti - C Black-tailed deer, Odocoileus hemionus columbianus - C Mountain goat, Oreamnos americanus - CL (introduced and removed)
