La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	'Siberian Chiffchaff ' revisited
Auteurs :	Alan R. Dean, Auteur ; Lars Svensson, Auteur
Type de document :	Article
Dans :	British Birds (98(8) AUG 2005)
Article en page(s) :	396-410
Résumé :	The systematics and morphology of Common Chiffchaff Phylloscopus collybita of the Siberian subspecies tristis are much debated. Many putative tristis in Britain are distinctly pale and frequently attributed to 'fulvescens', a form initially described by Severtzov in 1873 from a series collected in Central Asia. Treatment of the taxonomy and appearance of 'fulvescens' is inconsistent. It is frequently presented as an 'intergrade' population resulting from unrestricted gene-flow between tristis and the North Fenno-Scandian and Russian race abietinus but this may not be the most appropriate interpretation. This article reviews the variable treatment of 'fulvescens' in the literature, its differences from abietinus and east Siberian tristis and the conflicting results of research into its taxonomic status. Based on the information presented, the provenance and appearance of the pale, 'grey-and-white' tristis-like chiffchaffs reported in Britain are considered.

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