Gymnogyps californianus March 15, 1946 Hopper Canyon, Cal.F. small. The water was somewhat soiled as if from birds bathing or wading. There are no new condor tracks further up the creek. 5 condors soared near the Big Cave area at this time-per- haps on account of me. Measured some con- dor pieces 20" long x 2 3/4" offset, 16"x1". The length of one track from center of front claw to center of hind one - 7" average of several with little variation. Widths aver- aged 4 1/2 " (claw center to claw center). Some were 4 3/4 & one 5 3/4". At 10:40 I peered over the cliff top & saw an adult standing on Whitewash Ledge. About 10:50 I again looked over the edge - an imm. was running back about 20' above adult & another imm. stand- ing 20+ 'below. Both immatures had the white tips of greater secondary coverts form- ing a distinct line. Lower one had down just above tarsi for 1+". Both had backs of neck & head feathered. Apparently both perfectly fledged - no large feathers miss- ing or battered. Birds of 1975? Perhaps. I took a photo of the ledge & birds from about 200' away - they seemed concerned about me but did not fly. At about 11:00 the adult took off with a sudden jump