Gymnogyps californianus March 13, 1946 Hopper Canyon, Calif. Night calm. at 7:10 a.m. I looked at the horse carcass. Flushed an raven from it. Carcass still entire - apparently no coyote visitations. My main task today is to erect a good blind near top of Big Cave. Have procured an old auto tent from Sid Repton for this pur- pose. at 9 a.m. parked at head of tractor trail to Corder Creek. saw 1 raven feeding on horse carcass. Hiked dam road to N. end of cliffs leading to Big Cave & S. along top of cliffs. at 9:10 stopped to observe Arndell Ridge. I saw 2 condors perched on a dead P. at cliff top about 100 yds. E. of #11 nest site. One seemed to be making the mating display, walking up & down the branch for 6 ±' with wings half spread - possibly running however. Saw a 3rd condor flap glide E. near them and land in a dead P. 300 ± yds. further E. of the pair set on Arndell ridge. A few minutes later saw one circling over canyon near #11 nest; this one joined another & at 9:45 there were 5 circling over the brush near Corder Falls (rising time ? - I was too far away to cause disturbance & believe). Saw a group of 15 ± turkey vultures over North Slope. Sky clear, air warm, light SW breeze. at 9:58 the pair near #11 nest gone. Saw two