Birds of Indian Subcontinent

The effect of parent sex on prey deliveries to fledgling Eurasian Sparrowhawks Accipiter nisus

Publication Type:Journal Article
Year of Publication:2003
Authors:Eldegard, K, Selås, V, Sonerud, GA, Steel, C, Rafoss, T
Date Published:2003
ISBN Number:1474-919X
Keywords:Accipiter, Accipiter nisus, Accipitridae, Nisus, Norway, Passer, Passer montanus, Passeridae
Abstract: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.
Short Title:Ibis
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith