The genus Antrozous is confined to western United States and northwestern Mexico. Two species are recognized by [Miller] (1924: 84). One of these (pallidus) includes three geographic races. A single race is known to occur in Washington.
Fig. 47. Distribution of the pallid bat, Antrozous pallidus cantwelli, in Washington.
The pallid bat chooses a crevice in a cliff, cave, or building as its daytime hiding place. Like Corynorhinus, it is colonial. The basalt cliffs of eastern Washington offer such ideal hiding places that pallid bats are seldom seen and consequently little is known of their habits. In the southwestern United States, pallid bats are more abundant and better known. H. W. [Grinnell] (1918: 355) notes that the floor of a roost of pallid bats was strewn each morning with the heads, wings, and legs of insects. Most numerous were the remains of the Jerusalem cricket (Stenopelmatus), a flightless insect that the bats must have secured on the ground. [Engler] (1943: 96) found that in captivity, pallid bats would kill and eat smaller bats and lizards confined with them.
[Bailey] (1936: 392) believes that the young of this bat are born in late June and early July. One or two young constitute a litter.
Ursus americanus Pallas
Black bear
Description.—The black bear is the largest carnivore found in Washington if the grizzly is extinct there. The exact size of the adult male black bear is somewhat in question. Few actual weights are on record of Washington bears. [Grinnell], Dixon and Linsdale (1937: 101) paid special attention to the maximum weight of black bears in California and concluded that few ever exceeded 500 pounds. The total length of the largest black bear among specimens from the entire Pacific Coastal area, especially from California and Alaska, they give as 5 feet, 10 inches (op. cit., p. 102). It may safely be assumed that few individuals ever reach a length of six feet. Females are smaller; recorded weights of adults rarely exceed 350 pounds. The largest males have hind feet from 10 to 10-1/2 inches in length.