La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Origins of irruptive migrations by Common Crossbills Loxia curvirostra into northwestern Europe revealed by stable isotope analysis
Auteurs :	Mick Marquiss, Auteur ; Ian Newton, Auteur ; Keith A. Hobson, Auteur ; Yann Kolbeinsson, Auteur
Type de document :	Article
Dans :	Ibis (154(2) APR 2012)
Article en page(s) :	400-409
Résumé :	We used analyses of stable hydrogen isotope (d2H) measurements in Common Crossbill feathers (d2Hf) to infer the region of origin of Crossbills collected from different irruptions into Britain, Iceland and the Faeroes, comparing these values with those from birds sampled in breeding areas in Britain and elsewhere in the western Palaearctic. No differences in d2Hf values were found between different species or sexes of Crossbills that could be presumed to have grown their feathers in the same region, but juveniles had lower d2Hf values than adults that had grown their feathers in the same region. On the basis mainly of museum skins, immigrant birds were sampled from 30 different irruption years, spanning the period 1866-2009, with annual samples varying from one to

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