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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Life-history traits of Honey Buzzards (Pernis apivorus) in Africa.
Auteurs :	Rob G. Bijlsma, Auteur
Type de document :	Article
Dans :	Vogelwarte (41(4) Dezember 2002)
Article en page(s) :	240-248
Langues:	Allemand
Résumé :	In February 2001, wintering Honey Buzzards were observed in southeastern Nigeria during systematic focal watches from fixed observation points. In an area of 600 ha, 34 records were obtained, among which 11 adults, 1 3rd calender-year and 14 juveniles. At least 20 individuals were involved based on individual variations in plumage and moult. High altitude flights were typical between 10:00 and 12:40 h local time, during which the birds ranged widely (>2 kin) without showing intra-specific agonistic behaviour. Foraging commenced in early morning (birds with small crops seen) and -most likely- in the afternoon. Rainforest was the preferred habitat. Adult Honey Buzzards were in advanced primary moult, with females slightly ahead of males; both sexes had (almost) finished the moult in rectrices. It is argued that Honey Buzzards in Africa are closely associated with lowland rainforest and moist woodlands. This would indicate a much smaller wintering region than hitherto surmised (less than 25% of the breeding range), and one that is seriously threatened by habitat destruction. An age-specific dichotomy in wintering quarters is likely, with juveniles on average residing more often in central parts of Africa. Adult Honey Buzzards remaining in Africa during the breeding season may have experienced adverse conditions during breeding and moulting in the preceding year.

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