Gymnogyps californianus June 4, 1946 Hopper Canyon, Calif. Possibly we still perched near Flat Ps. At 12:00 we started N. up cliff tops. 12:05, one adult came toward us from W., circled 300' overhead, then went 1/2 mile N., circled again, then soared S. over East Canyon. A second adult circled near Arundell Cliffe & sighted atop Flat Ps. Another adult was atop Ps. about 200 yds. E. of that one - as before today. We hiked to car at head of tractor trail, then drove to Pyramid Lookout. From there at 1:55 I saw none on Flat Ps. or elsewhere. Fair W. breeze persisted; visibility beyond Hopper Basin restricted by haze. By 3 p.m., with constant search from Pyramid 20, I saw no condors. 3:50, 3:05, I saw one adult light in a dead Ps. near N. end of Rock Ridge - a moment later it was off, gliding N., & this appeared behind (E. of) a ridge about 1/2 mile N. of tree. 3:50, I saw one adult soaring near Conda Cliff. It swooped over Falle Break & sighted atop cliff over Whitewash Ledge. A raven dove at it 2 or 3 times, coming within 8' of condor. The condor took off, still pursued by raven, & landed in a path hole beneath the ledge. Another pathole, 10' to N. of this one, was also apparently occupied by a condor. 4:27, the adult which sighted in pathole left & soared straight to N. side of Crumble Ridge. Breeze fair from SW at 4:30. 4:35 I saw