La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	From the Rarities Committee's files Proposed criteria for BBRC assessment of claims of 'Amur Wagtail'
Auteurs :	Adam Rowlands, Auteur
Type de document :	Article
Dans :	British Birds (103(5) MAY 2010)
Article en page(s) :	268-275
Résumé :	Criteria for the assessment of 'Amur Wagtail' Motacilla alba leucopsis in a vagrant context were established, based on field exerience, literature sources, museum specimens and photographs. Adult and first-winter leucopsis can be separated from all other forms of White Wagtail by the isolated black breast patch, which is smaller than that of other races, and by the extensive white sides to the head and neck. First-winters are more likely to be mistaken for other races but can be safely separated from all other forms of White Wagtail by a combination of diagnostic and supportive characters, as described. The problems of variants and intergrades are discussed.

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