The White-throated Swift, Aeronautes saxatalis, occurs widely in western North America utilizing narrow crevices in rock cliffs, from sea level to 13,000 feet, for both nesting and roosting sites (Bent 1940:311). These swifts have on several occasions been noted using man-made structures for these activities (Bailey 1907, Skinner 1933, Pitelka 1944, Yocom 1966, DeSante and Perrone 1968). We present here additional observations of these swifts utilizing man-made structures in southern California.