La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Temporal changes in spring migration phenology in the Norwegian Greylag Goose Anser anser, 1971-2004
Auteurs :	Pierre A. Pistorius, Auteur ; Arne Follestad, Auteur ; Frances E. Taylor, Auteur
Type de document :	Article
Dans :	Wildfowl (56 2006)
Article en page(s) :	23-36
Langues:	Anglais
Résumé :	During spring, Greylag Geese Anser anser migrate from staging grounds in the Netherlands to breeding sites in Norway. The timing of this migration is critical as it corresponds to the most energetically expensive period in the birds' seasonal cycle, and governs the time available for breeding during the short northern summer. This paper reports how the spring migration and the subsequent breeding season of Greylag Geese nesting in Norway have gradually become earlier since 1971, by about 5-7 days per decade up to 2004. First arrival date, median arrival date and first hatching date at the most important breeding site in Norway were inversely related to spring temperatures in the Netherlands, suggesting that this trend may be a function of climate change.

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