Cogswell 1950 Hesperiphona vespertina 2 July 8 S slope "Signal Hill" [see June 21] - 2 seen July 9 Lake Valley, S. of Lake Tahoe , 6300+ ft. {small groups - Martes Peak ridge, N. of Lake Tahoe, 700 ft.} seen in conifers forest areas. July 11 Soda Springs, 6750 ft., [illegible] 4 mi. S to S-facing slope of N. Fork Am. River Canyon, 6300 ft., Placer Co., Calif. - about 10 heard, several of them seen, on 4 stops in forest (Canadian + Transition zones) and forest bordering chaparral areas. The one nest we discovered in 1948 was at 6800 ft. alt. in this area; but the Jeffrey pine in which it was situated has since been taken for lumber, together with many of its red + white firs surrounding it. July 13 near Sugar Bowl Lodge [see July 6] - 2 seen in red fir - + white pine lodgepole pine forest bordering cleared ski slopes. 2400 ft. E. side Mary Lake, 1 3 mi SSW Donner Pass, Placer Co., Calif 3+ in similar forest: July 22 Cisco Grove, 5650 ft., on S. Fork Yuba R., Placer Co., Calif 1 ?? on ground under cottonwoods again [cf. July 5]. July 24 near Sugar Bowl Lodge [see above] - 4 & 2 noted on July 25 these dates, their occurrence becoming more frequent. July 25 S slope "Signal Hill" [see above] - About 10 seen or heard on 1 1/2 hr. visit. They are noticeably more common in certain areas - here in sparse forest + chaparral and in denser forest of Am. River C. & Martes Ridge - but I am at a loss to describe the habitat more precisely. July 27 about 20 seen in 1 flock here today, including at least several definite juvenals (lots of down on head).