California Condor Ebendmchillan 14 August 1963 at 6.40 and drifted from sight to the East. I left the area at 6:45 p.m. The low sun now cast a shadow into the Pines on South side of canyon making observation difficult. While the adult Condor came and went from the Cow Carcass it was of particular interest to see how easily they could drop down among the Oaks where the Cow Carcass lay and also leave the area when finished with feeding. Several of the adult Condor that came up out of the place where the Carcass lay, passed by within 60 yards of me, appeared to have been filled with food, as their crops, well extended, showed the large red base patch of skin where the feathers had separated with the expansion of the skin over the full crop. A prevailing West breeze probably helped them in getting out of this Canyon. At no time did I see a Condor, coming from the Carcass, that seemed in trouble. The power of their wing-beats could be realized when one heard the swoosh of their wings as they beat the air in gaining elevation. In coming up out of the trees, from the Carcass, the Condor were forced to spring upward about 25 feet as I could see no means by which a large bird could maneuver out among the thickly growing trees. The Condor that flew and lit on the dead Oak 70 feet from the carcass, a maneuver several of the birds accomplished, called for an upward lift of about 40 feet in the seventy feet of flying distance to this tree. I am sure the Condor that fed in the Canyon today knew of my whereabouts, for where I sat seemed to be the logical route over which the Condor would fly as they came out from the Carcass. No Condor came out directly over me. Some did circle over me after having come from the Carcass by a different route.