Gymnogyps californianus April 3, 1946 San Diego (200), Calif. keeper. The following spring the youngster objected violently to the "love making" of the adults. It was sent to the National Zoo at their request in summer. No egg was laid in '43. Both adults incubated the egg, taking turns quite fairly. The father was seen to feed the youngster often but the mother seldom or never. Feeding was by regurgitation. When youngster was fairly large the adults would regurgitate the food on the ground & the imm. would eat it. Both adults did this regurgitating. The chick came out of the cave the last of Nov. or first part of Dec. There was no nesting material - the egg was laid on the ground litter. One photo by McKenney (former photographer) showed the youngster at 7 weeks. at that time it was all dark down. Picture showed bird with head down & tongue out like gymnogyps.. Chick was down on its heels & was said to have grrunted (Stott & Kerlepatrick said they never heard the old young bird make a sound). Another photo by Norman Van Belt (1034 8th St. San Diego) showed the youngster out of the nest on January 7, 1943. The fledgling was downy on legs & breast