Ford 2945 Gymnogyps californianus Hopper Canyon, Calif. March 15, 1946 the birds appeared: 3 6 5 2 (m. ad.) an older 1 0 an older yet imm. perched next to # 5 - this one with orange cheeks + pink neck but sooty around eyes + lorestrum. 4:21 - several landed; 10 total visible. 4:25 - 17 visible, 8 definitely imm - sturns (not counting # 5). Some adults are rosy around ears + sides of neck - others not - a sexual characteristic? Saw one display brightly step cliff. An imm. landed 20± 'N. of dry pool. stop falls but left. 4: 40 ± - 15 total; at least 7 dark heads. 4:45 - three adults step cliff over Big Cue. One was a near-adult - a little sooty. One adult displayed in normal fashion, & lock of neck toward displayer, tail not spread but dragging stiffly on the rocks. The displayer was the near adult. It nibbled at wing lining and prop. apterium of displayer. Displayer put one foot on top of head of other 3 ± times. The third adult was in the way of the 2 much of the time; it left & display continued. Displayer had no noticeable pink on side of neck but red spot at base dorsally woorway bright + crop apterium bulged (even after dis- play). THe walking motion was mainly a side to side rocking on the feet. Displayer left & displayer 1± minute later. Displayer