Gymnogyps californianus February 11, 1946 Hopper Canyon, Calif. Half the condors near Big Cave are adults. Quiescence predominates tho one occasionally walks about or shifts perches. 5 p.m. - the lone bird beyond Rock Ridge perched as before. 3 adults atop cliff above Whitewash Ridge, 6 ft in potholes & 16+ on open ledges. Two adults atop cliff seemed very friendly & at times it appeared that a mating display was in progress - a 3rd adult stood 10+ ft. away. A youngster alighted 6+' from this 3rd adult. About 3 minutes later one of the pair walked over to the 3rd adult - the youngster flew away. Some of the perched birds - especially isolated ones in potholes - have apparently not shifted roosts for over an hour. No birds seen roosting in trees; more, near pool stop Big Cave since 3:30 apparently; no scanning seen. 5:10 - counted at least 30 condors at Big Cave, + milling in air about the roast ledges. Sunset shadow has crossed top of Big Cave (3:10). 3:15; those, plus including 2 on a tap bare green-tipped branch of Roast Tree. Still