Gymnogyps californianus March 15, 1946 Hopper Canyon, Calif. cliff end me in pothole. I cannot see Roost Tree or pothole on N. face of Canda Cliff from blind- The nest may lie there. None has seemed to be alarmed by the blind. Adult bar ruff seen - 520 F., no wind. 5:45, only 1 (min). on Whitewash Ledge now - 3 in potholes over Big Cave, one on shelf there, & 1 adult atop cliff 300+ yds. N. of Big Cave. 5:48, the shelf shelve off & one (same?) into small pothole over Big Cave which contained another adult. 5:55, the imm. shifted from the open ledge to shelf over Big Cave (somewhat pro- tected). The 3 potholes over Big Cave each contain at least 1 adult. One young adult still atop cliff 300+ yds. N. of Big Cave. 5:57, a second fuzzy head was perched below Whitewash Ledge. It flew to shelf by other imm., then about 1 minute later to whitewash ledge. At 6 p.m. 4 orange heads + 2 fuzzy heads visible at least in part, more seemingly crunched flat for the night. Two roars raved vociferously near Big Cave - imm. seemed mildly interested. 6:02, a 3rd fuzzy head alighted in hole below Whitewash Ledge (unoccupied). 6:03 - the orange head left cliff top, one flew alighted low on whitewash ledge, & by jumps + flaps worked 20+ up the ledge. The 5 pothole over Big Cave became