Gymnogyps californianus March 3, 1946. Hopper Canyon, Cal; At about 10:08 the two adults soared toward East Canyon together. During display, display feathers seemed to have long cheeks. Both seem ed to have unwrinkled necks. After the display ruffs went up to hoods - cool stray breeze still. About ¼ mile W. of Greta's cave at 9:30 I found an old vorder hum erus (my no. 203), well weathered, with surface broken away at several spots near the tips. In flight, tail of adult showed considerable gambler, only center feathers maximum flaps pointed 75° being flush with back. At 10:35, 2 imm. & 1 adult still on the flat ledge near foot of Whitewash Ledge - all quite inactive. The immatures just perched, looked to sun, 10±' apart, perhaps occasionally preening. No other vorders visible. They 2½ resembled clouds moving 5±; breeze up the canyon (E±) at base of Arundell Cliffs: I went to top of Arundell Cliffs & then down to Greta's nest- #2 nest cave. At 11:05, before reaching the cave, I saw an adult soaring 500±' overhead. In the cave I found an egg. The egg was pale blue, slightly more pointed at one end than the other, & more elongated than the one I photograph ed near Whitacre Pl., in 1941. There was some dark