These animals are ordinarily nocturnal in habit, but may occasionally be seen by day. They are not excessively shy, and oftentimes create quite a disturbance with their nightly prowlings when they are found about campsites or dwellings. Their presence is frequently made known by a soft “thump-thump-thump” made at regular intervals of about one second by tapping a hind foot on the ground, rock, or some object. The wood rat has a distinct musky odor, and a cave, crevice, or cabin in which they have established residence can be recognized at once, even by man’s inferior sense of smell, by the atmosphere. It is readily apparent from the preceding discussion that the reputation the wood rat has made among woodsmen and campers as a nuisance is not ill-founded. They are interesting and active creatures, however, not nearly so unsavory as the name “rat” implies, and in many instances the entertainment they provide outweighs their less engaging habits. [Illustration: The inquisitive and abundant white-footed mice are immaculately clean animals.] WASHINGTON WHITE-FOOTED MOUSE, DEER MOUSE _Peromyscus maniculatus oreas_ Bangs The white-footed mouse is about the size of a house mouse, with the head and body about three and one-half inches in length, the tail about four and one-half inches. The ears and eyes are large; the tail is comparatively long, blackish-brown above, white below. The general coloration over the head and back is a rather dark tawny-brown, intermixed with black hairs, with a preponderance of black toward the base of the tail. The underparts are white, with the lead-gray hair bases showing through; the feet are white. In examining this mouse, the impression is one of an immaculately clean little animal, definitely at variance with the usual conception of mice. _Specimens in park collection:_ RNP-3, RNP-4, RNP-22, RNP-23, RNP-35, RNP-36, RNP-37, RNP-38, RNP-39, RNP-77, RNP-84, and RNP-91, together with a mounted specimen; Longmire Museum, Park Headquarters. The white-footed mice are distributed over nearly all of North America south of the Arctic Circle. The Washington species is found in the western part of the state and northward into southern British Columbia. On Mount Rainier it occurs throughout the park to elevations well above forest line, and has been recorded on the summit of the Mountain. The inquisitive, active, and abundant white-footed mice are attractive and familiar inhabitants of the woods about the Mountain. They are readily adaptable to a variety of conditions, and are quick to invade camps and dwellings in search of shelter and food. They are particularly fond of cereal grains, and will often damage clothing left within their reach, since these materials are evidently highly prized for the nest. Campers will do well to protect food-stuffs and garments from their foraging instincts.