Gymnogyps californianus June 4, 1946 Hopper Canyon, Calif. Flat Rs. Air calm & warm, sky clear. At 8:10 the adult still perched, & I spotted two others. One was atop a curved dead Rs. above and about 100 yds. to W. of Brett's nest, & the other on top branch of a stub about 200 yds. further W. and 100+ higher. Do 3 total visible (the last described possibly a turkey milture; off a few minutes later). 8:45 the two still perched; the one near- set Brett's apparently a near adult. Light S. breeze by 8:45. I saw 2 turkey miltures soaring before 8 a.m. today. 9 a.m., we were atop Big Cave. The pool was dry though many old cinder tracks remained. At 9:15 I saw the immatures perch empty & an immin. circling near Arundell Saddle. The bird circled & rose to over Spring Meadow, then flop-glided past North Paint to over North Slope, then circled & rose above North Ridge (9:22). The adult re- mained perched on Flat Rs. as before. Light to fair S. or SW breeze. At 9:33 the adult was off - it circled and rose over Arundell Ridge, then worked up toward Pyramid lookout & skimmed W. over the Rim about 300 yds. S. of the lookout (9:40?). At 9:42 I saw an adult descending above Ar- undell Ridge; it alighted with 5 backing flaps on a stub branch of a dead Rs. about halfway