Peterson 1935. Collopermophilus lateralis July 31. 13 mi. N Paradise Valley, 6700ft., Humboldt Co., Nevada. (Cont.) One specimen shot at with 410 #12 shell, but it got away: at maximum effective range of 410 shell. Collopermophilus very wary + quiet. Do go into traps without hesitation, but take immediate alarm at sight of human being. Dwell amongst rocks & cliffs where enough dirt to construct burrow. Upon sight of man, run + scurry, rather clumsily + not especially fast, to edge of burrow where may pause for a moment then dive into it & remain there until one departs from the environs or indefinitely if one remains on premises, at least do not manifest selves in any way, altho they may peep from around rocks, from crevices, grass, bush or other shelter quietly. Sometimes do utter useful note at edge of burrow, repeated once or twice or oftener per minute -- like Citellus mollis & Citellus beechyi. Best method to hunt them is to come up over a ridge, shooting them with only one's head visible to them, as they sit at edge of burrow under those circumstances