Gymnogyps californianus March 9, 1946 Hopper Canyon, Calif. of vordors but without results. On one occasion they saw 22 sure (Wool counted 24) vordors in air perched on trees at head of Hopper Canyon when they returned to a carcass they had put there. Between 11 and 2 p.m. he thought the most likely time for vordors to show up at the bait. One of the immature seen had as pinkish neck but sooty head- from top head appeared like imm. but from below like adult. Some of the adults which alighted atop chip cliff dropped straight down vertically, flapping with wing tips. March 10, 1946 Hopper Canyon, Calif. Still night. Cirrus clouds in morning. 57° F. at 9 a.m. At 9:15 a.m. we were at head of the canyon & saw 2 vordors gliding northward at about 500 ft. altitude. They passed about 200 yds. W. of horse carcass it appeared & continued on toward Whiteacre Pkts without circling. At 9:20 we were in blind at horse carcass. The carcass showed no evidence of molestation by carnivores. At 10:20 I heard one rover croaking close at hand - apparently circling over the carcass but out of our sight. Occasionally thereafter heard a rover croak or saw a shadow pass