Gymnogyps californianus April 10, 1946 Hopper Canyon, Calif. The underparts of this bird seemed quite downy - light areas (down probably) at tops of tarsus & sternum - doubtless a 1945 youngster & smart enough to find some food by following adults. 10:28 a raven hounded over the youngster, swinging from side to side. The youngster wobbled from side to side with the raven and twice reached up with open bill toward the raven. 10:39, now only 3 ravens and 1 turkey vulture at the carcass. Imm. left its boulder perch (out of sight again). 10:38 all the birds left carcass - I saw two imm. condors in air close to carcass; they circled low over #1 nest camps, then down the canyon. The ravens were back on carcass within a few seconds. 10:41 I saw an adult soar down canyon via some route - perhaps it caused the alarm. I supposed the imm. had left carcass area. Turkey vultures back on carcass by 10:43. I went to the carcass & took photos of it. The neck & rear end were almost completely gone - the windpipe exposed. There were hundreds of flies on the carcass. About 12:00 the puyton boys returned - they had not found the duck hawk's nest at Whitacre Pk. nor seen any condors after leaving Hopper Canyon. We hiked down the road & along cliff top to Big Cave top (arrived about 1:25). Condor tracks thick in the wet sand there & the pool full of fallen flowing. The tracks went back to about 75' from falls brink. We collected a set of duck