Gymnogyps californianus March 15, 1946 Hopper Canyon, Calif. vocant - lowest immature flapped up to it & in. at 6:05: 6 at Big Cave area. 6:08, with 17 flaps, we entered the pathole & the min. left. Adult came from Whitewash Ledge so probably same (rock order?). 6:10, the lone min. on Whitewash Ledge now crouched flat on ledge facing cliff. 6:12 - heard me move off - apparently the last one to slight in pathole. All 3 patholes filled at 6:15 (by adults) and 2 min. on open ledges. Air calm. 6:25 - saw a second on lower Whitewash Ledge. The min. previously there shifted to the shelf over top of Big Cave. Poorwills heard - first this year. 6:45 p.m. - by moonlight mainly saw 2 still on Whitewash Ledge & 1 on shelf over Big Cave. Same at 11 p.m. At 6:30 F. Wool, Telford Work, & Al Wool, & Harold Nell Hill arrived. Work stayed in blind with me & Wool & Hill camped up the canyon from Big Cave. They had been at horse carcass to about 4 p.m. but no carcass had come. They met Frank Arnold on way up Pole Canyon & Frank told them of his carion collecting experiences in the old days very willingly. Work will take movies at Big Cave tomorrow while Nell & Wool will explore out 1 canyon.