Gymnogyps californianus April 14, 1946 Hopper Canyon, Calif. 9:15, the 3 imm. left, 30± sec. apart. One remain- ing adult stretched right wing & leg down & back. The adult over cave on ledge did likewise. 5 adults only corms remaining in sightmen Big Cave. 9:20, one imm. (dark head) alighted atop cliff ¼ mile N. of Big Cave. 9:30, 3 adults on Whitewash Ledge (1 crocked flat) occasionally preening, 1 adult in pathhole, 1 on ledge over Big Cave (as 2 hrs. ago), 1 dark head atop cliff to N. Violet-green swallows constantly fluttering around the perching area - no corms reaction. 9:43, imm. gone from atop cliff to N. of cave. Between 9:45 & 9:50, all but the adult on ledge directly above Big Cave look off, 1 or 2 at a time, occasionally another landing. There were [illegible] in air above horizon before the close birds took off - the corms in air seemed to excite the perched birds. Breeze was light enough to ripple tent blind. The birds did not circle back near cave after leaving but 2 or 3 did alight briefly atop cliff ¼ mile N. of the cave. At 9:52 the long perched adult on big over the cave took off - none visible perched. We left blind then saw one adult swimming back atop Rose Tree. Ed took pictures of this & flush- ed the bird by approaching within about 100 yds. & saw 6 circling above N. Ridge, & 2 working their way N. that direction at 10 a.m. We were in the open