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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Identification of 'black-and-white' storm-petrels of the North Atlantic
Auteurs :	Robert L. Flood, Auteur ; Bryan Thomas, Auteur
Type de document :	Article
Dans :	British Birds (100(7) JUL 2007)
Article en page(s) :	407-442
Résumé :	This review article consolidates identification criteria for the six species of 'black-and-white' storm-petrel recorded or claimed in the North Atlantic: European Storm-petrel Hydrobates pelagicus,Wilson's Storm-petrel Oceanites oceanicus, Leach's Storm-petrel Oceanodroma leucorhoa, Madeiran Storm-petrel O. castro, Black-bellied Storm-petrel Fregetta tropica and White-bellied Storm-petrel F grallaria. Established knowledge is updated with fresh insights and illustrated with instructive digital images.We have two aims: (a) to support County Recorders in Britain now responsible for evaluating Wilson's Storm-petrel submissions; and (b) to bring to a wider international audience current understanding about identification of North Atlantic 'blackand-white' storm-petrels. The article has two main sections: (a) a general discussion about identification of the storm-petrels under review; and (b) detailed species accounts, and information on how each species can be distinguished from the other five species (though white-bellied Fregetta storm-petrels remain problematic). A template that outlines our view of what constitutes a sound submission of a reportable 'black-and-white' storm-petrel is proposed. The main text is supported by ten appendices covering size illusion and exaggeration, factors of scale, angle of view, descriptive terminology for flight behaviour, chum and chumming, and wear, moult and bleaching. We focus on vessel-based observation since, realistically, this is the optimal means of getting to grips with storm-petrels in the field and is the main source of our experience. Land-based observation rarely affords the views essential to apply the finer points of this presentation.

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