California Condor Eban Jackmillan 29 October 1963 headwaters of Pleito Creek. Salt Creek dropped off sharply to my East, 100+ White Throated Swift were circling in a group above this point. At times they would move in my direction coming so close as they dashed by at high speed that the rush of air from their wings made a hissing sound. They screamed continually. At other times this flock of Swifts would drift out over the Salt Creek drainage to the South East and sometimes circle over a point to my Northeast about one quarter mile from where it was, but they never ventured Westward out over Neason's Flats or to the Northwest over Pleito Creek. At times they circled, as a group, quite high above the area. At 10:49 A.M., an adult Condor was seen circling up out of the Neason's Flat area. Soon after I saw this bird it moved my direction, gaining elevation as it came, soaring, and not circling, with wings set for elevating and not for a flex glide. Were it not for the palmette effects of the primary feathers of Condor when advancing towards one in this style of flight they could be mistaken for a Golden Eagle. But the bristly primary feathers, and the stable glide pattern will allow for its identification, providing one can hold the bird in view for a few moments. This bird came on and as it passed to my South, about three hundred Yards, and as far above my plane, it experienced severe updrafts of air that were welling up from the Canyons below and causing this Condor to maneuver its wings to remain stable. Again as I have noted before, one gained the impression that this bird was passing through air currents not unlike Ocean Waves. The forward wing, that is forward to the line of the advancing wave of air, would rise and then dip to let this wave pass under without throwing the bird off keel. One could see this wave pass under this Condor and out the other side by the way its wings dipped and raised to-