Mammals of Mount Rainier National ParkPotts, Merlin K.
History
Mammals of Mount Rainier National Park
Potts, Merlin K.
Mammals -- Washington (State) -- Mount Rainier National Park
It is found in the Klamath section of Oregon, a narrow strip along the
coast of California, and in the Cascades from Washington to British
Columbia. It has been recorded at elevations ranging from 2,000 to 4,000
feet on the west and south sides of the park. Like all water shrews it
prefers moist areas and is usually found around wet meadows or in the
forest cover near lowland creeks.
_Specimens in park collection:_ Wandering shrew, RNP-89; Olympic dusky
shrew, RNP-55, RNP-88; cinereous shrew, none; Trowbridge shrew, RNP-61;
navigator water shrew, RNP-64, RNP-83, RNP-90; Bendire water shrew,
RNP-1, RNP-56, RNP-72; Longmire Museum, Park Headquarters.
Because of their secretiveness and tiny size the shrews are seldom
observed, although they are relatively abundant in the park. By
stationing oneself in an elevated spot near a grassy stream bank or in a
damp, shady, forested area it is sometimes possible to observe the
actions of these small creatures. While their diet is largely composed
of insects, they do eat such things as worms, as well as small birds and
mammals that they can kill. They are very nervous animals and extremely
courageous hunters, and will attack and kill other mammals much larger
in size. They require an abundance of food to live and will die if
deprived of food for even a few hours. This might lead one to suppose
that they are somewhat weak, but such is not the case. They are active
throughout the year, being seen abroad under even the most rigorous
climatic conditions.
THE BATS
Of the four types of bats known to occur in the park, only two are
closely related. These two are very small as compared to their larger
cousins.
The Miller bat, _Myotis yumanensis saturatus_ Miller, is a small bat
with the upperparts dark glossy yellowish brown and the underparts
golden. The sides, chin and throat are somewhat darker than the
underparts. The fur over the entire body is slaty black at the base. The
membranes of the wings are blackish.
This bat is found in the transition zone of British Columbia,
Washington, Oregon and northern California, along the coast.
It has been taken at Longmire, Paradise Valley and Sunset Park. It stays
in the forests of the park, only occasionally being seen above the open
meadows.
The coloration of the Northwestern long-legged bat, _Myotis volans
longicrus_ (True), above is dark brownish, sometimes blackish; the
underparts are dusky brown. The ears and wings are blackish. This bat
cannot be distinguished in flight from the Miller bat.
It is found in the humid coast and mountain region from Admiralty
Island, Alaska, to Monterey County, California.
While it is apparently fairly common at the lower elevations, very few
collections have been made. It has been taken at St. Andrews Park (5,500
feet) and at Longmire.
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