Gymnogyps californianus June 4, 1946 Hopper Basin, Calif. Between Loretta's nest & Arundell Saddle. About 2 minutes later it was off & after a couple of circles alighted in a green P.S. about 50 yds. uphill from former perch. There the bird stood in shade on a dead branch. 10:15, the adult perched as before, facing away from slope. 10:42, I saw another adult 300' above us. It circled 2 or 3 times near the summit, headed W., glided N. to near North Pt., then S. toward Pyramid 10. About 10:45 the perched adult took off & perched a limb of a dead P.S. about #100 yds. E. of Loretta's. The adult turned around 3 or 4 times, each time with wings up or flopping, in about 2 minutes; then shifted to a whitewood point under an overhang in center of main Arundell Cliff. I saw 2 other adult condors soaring nearby; it then the perched one took off (about 10:50) & joined them. They rose over Arundell Ridge & soared back & forth low over it. One circled & rose & was over Pyramid 10 at 11:00 a.m. One other perched on a branch of a green P.S. - the other swooped up to land there & first took off & subsequently landed (11:02) about 300 yds. to W. of first in a green P.S. near Flat P.S. First bird in some tree as the long-perched adult (to 10:42). About 11:20, the E. one was off - it circled & rose over S. Ridge area with another condor (11:30).