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Observations of a Zone-tailed hawk family in the post fledging period

AutorHiraldo, F. ; Delibes, M. ; Estrella, Ricardo R.
Fecha de publicación1989
EditorRaptor Research Foundation
CitaciónJournal of Raptor Research, 23(3): 103-106 (1989)
ResumenHawk (Buteo albonotatus) family were recorded during the post- fledging period at Michilia Biosphere Reserve in Durango, Mexico, from mid-July to mid-August 1981. Numher of daily flights did not increase with time, hut average time span for each flight increased as nestlings grew older. Juveniles repeatedly performed movements that imitated hunting behaviour of adults. Time spent by adults near the nest decreased following fledging of young. Adults delivered 5.9 ± 2.8 ( ± S.D.) prey items/d (N = 10 d); nestlings daily consumed an estimated 296 ± 130 g (2 ± S.D.) daily. Amounts varied during the observation period. Differences in behaviour of both adults suggested that the parental role of each sex was different. Apparent aggression of adults towards young may be related to the development of juvenile flight and/or to dispersal. The family may have remained together away from the nest area, as probably occurs with other congeneric species.
Versión del editorhttp://elibrary.unm.edu/sora/jrr/v023n03/p00103-p00106.pdf
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