La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Crossing the Sahara desert: migratory strategies of the Grasshopper Warbler Locustella naevia
Auteurs :	Nicholas J. Bayly, Auteur ; Stephen J. R. Rumsey, Auteur ; Jacquie A. Clark, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (152(4) OCT 2011)
Article en page(s) :	933-946
Langues:	Anglais
Résumé :	The bi-annual crossing of the Sahara desert is a considerable energetic challenge faced by approximately a quarter of Europe's total bird population, as they migrate to and from sub-Saharan non-breeding grounds. Where, when and how migratory birds prepare for the crossing remains to be defined in many species, especially in sub-Saharan Africa. Here, we describe the migration and fuelling strategies employed by the Grasshopper Warbler Locustella naevia during the northern autumn and spring to cross the western Sahara using ringing datasets from Portugal and Senegal. Body masses in recaptured birds combined with flight ranges suggest that

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