Gymnogyps californianus March 16, 1946 Hopper Canyon, Calif. to the described place & found nothing. The place was in a pothole about 200 ft. above river bottom. We returned to Big Cave. Saw one close adult about 12:45+ young min. about 1 p.m. We entered blind at 1:35 - light E. breeze, sky clear, 70°F. By 4 p.m. no condors had land- ed at Big Cave area. Light breeze - much less than yesterday at this time. 4:40 p.m. - con- dors heard soaring near; 2 seen circling in front of Big Cave. An adult landed in pothole over N. side of Big Cave. Adult off down canyon at 7:50. Although not obviously disturbed, the condors may have been so disturbed by the blind & people yesterday, last night & today that they do not feel safe roosting at Big Cave tonight. Left blind about 5:20 & hiked N. long cliff tape. Saw one condo parked flat on Flat Ps. + possibly one other on Brundell Ridge by search with telescope. Perhaps the condors are not roosting in Hopper Basin tonight. Returned to camp at head of Hopper Canyon. March 17, 1946 Hopper Canyon, Calif. Fairly warm moonlight night overscast with scirius clouds. T. Work & I drove to Parking Place. at 7 a.m. saw 1 condor atop Flat Ps. on Brundell Ridge, 1 in a dead Ps. in Parking Canyon on Despe side of Parking Place. (300 ft. yds. down