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M Marin – The Condor, 1997 – JSTOR
Abstract
The behavior of Black Swifts was studied in southern California from 1990 to 1992. Four types of aerial interactions were distinguished: (a) group chase, (b) pair chase, (c) pair contact, and (d) touch and grasp. The latter two interactions can be intraspecific or interspecific. Aerial copulation was not observed.
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