La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Overseas movements to and from Britain by Greenfinches Carduelis chloris
Auteurs :	Iain G. Main, Auteur
Type de document :	Article
Dans :	Ringing & Migration (19(3) May, 1999)
Article en page(s) :	191-199
Résumé :	Ring recoveries from Greenfinches making overseas movements to and from Britain are analysed. On average, approximately 0.1% of all British Greenfinches move to Ireland for the winter, and an estimated 2% or more of those breeding in southeast England cross to continental Europe. In the case of the continent, there is evidence for a small movement in the opposite direction. Most Greenfinches moving to the Channel Islands in autumn also originate in south-east England. A few Norwegian Greenfinches cross the North Sea to winter in Scotland or northern England. It is suggested that these are part (not more than about 1%) of a population that normally winters at the Norwegian coast, whereas others found in south-east England are associated with a regular migration through Denmark and continental countries bordering the North Sea, the numbers reaching Britain representing a few percent of that migrating population. A sea crossing to or from Britain is an occasional rather than an annual event for any individual Greenfinch.

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