Gymnogyps californianus March 14, 1946 Hopper Canyon, Calif. there were 2 in this 4+1'f long pothole - one left & other 30+ sec. later. The north pothole below whitewash Ridge now occupied by an adult. 4:16, two one a ledge above Big Cove - one apparently had difficulty with footing & flopped 13 times before dropping off the cliff. One alighted atop the cliff but was chased off by a flying adult 2+ minutes later (both adults). Adults chase adults + imm., but never have seen an immature chase an adult. Have not seen the roast tree NW of Big Meadow being used this year - perhaps they offer poor protection from the cold. 4:22, I saw 2 (at least 1 adult) some low over the rim NE of Pyramid Lookout. Breeze light from SW as before, 450 F. 4:27 an adult, few feet down, soared from foot of East Canyon to- ward N+ west area as if to land somewhere. 4:30 a lone immature circled close to brush + bluffs at S. side of mouth of East Canyon. 4:33 - a lone adult near head of SE canyon over the Rim; 2+ minutes later it met 2 other adults & soared with one of them, the other following 100' above. 8 visible at Big Cove area - 20 // total at 4:35. 4:37, 2 adults + 1 imm. (?) near brink of falls atop Big Cave. One adult made motions as if