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The effect of parent sex on prey deliveries to fledgling Eurasian Sparrowhawks Accipiter nisus
Author(s) -
Eldegard Katrine,
Selås Vidar,
Sonerud Geir A.,
Steel Christian,
Rafoss Trond
Publication year - 2003
Publication title -
ibis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 80
eISSN - 1474-919X
pISSN - 0019-1019
DOI - 10.1046/j.1474-919x.2003.00229.x
Subject(s) - accipiter , fledge , predation , accipitridae , biology , zoology , demography , ecology , sociology
The relative contribution of each parent when providing for the fledglings has been recorded in only a few raptor species. We studied prey deliveries by Eurasian Sparrowhawk Accipiter nisus parents to fledglings at seven nests in southern Norway. Parents and young were fitted with radio‐transmitters. Males delivered a larger number of prey to the young than did females throughout the post‐fledging period (on average c. 80% of the deliveries). Two females were never observed to deliver food to the offspring, and their mates apparently raised the young to independence alone. The duration of the post‐fledging period was positively related to per‐capita delivery rate in the late stage.