Gymnogyps californianus March 21, 1946 Hopper Canyon, Calif. color. We had entered the cave at Cave Point at about 10:40 to observe #11 nest vicinity. 40° F., fair breeze from SE, cloud layer at about 8000 ft. (cumulus stratus). Many snow patches on rocks & ground from yesterday's storm. 11:26 an adult landed in some dead P's again & took off about 1 minute later & soared E. down canyon passing 80 ft' above #11 nest - perhaps our original approach flushed the incubating adult which is now trying to reenter the nest but is disturbed by us. Our location was in a cave about 1/4 mile NW of #11 nest. At 11:43 the adult returned & perched atop Flat P... saw this bird erect in air while flying, left a long string of white excrement. About 11:46 shifted to green P's. 300 ft yde. NE of #11 nest & at 11:47 to the first tall dead P's. Before the 11:46 perching the adult soared 100 ft' above our cave. We stayed well back in cave but were visible from the peak tower on Russell Ridge. The adult jumped up to a 4+ ft' higher perch about 2 minutes after landing. In 3 landings on this tree the adult has used 3 different perches. Pres- ent perch is 12+ ft from top of 60+ ft tall dead P's. on a 12" stub branch. Branch will not support outer toe of left foot apparently as too short - bird is squeezed against trunk & facing away from cliff (toward us). Ruff up to ears. Adult once flopped wings several times as if to