LITTLE AND PALM SWIFTS BREEDING ON MAN-MADE STRUCTURES IN RHODESIA

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Abstract
The switch to man-made breeding sites by the Little Swift Apus affinis in the Northern Province of Northern Rhodesia has already been chronicled in part and discussed by Brooke and Vernon (1961). The use of railway bridges as breeding sites by the Palm Swift Cypsiurus parvus has been noted by Irwin (1953) for the Sebakwe River and Benson and White (1957) for the Kafue River. This paper chronicles the expansion of the two swifts and gives further data on the breeding activities of bridge-nesting Palm Swifts in the two Rhodesias.