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Primary moult in Iberian Chiffchaff as a means of ageing and identification

Joan Castelló Massip, Auteur ; Marcel Gil-Velasco, Auteur

Dans British Birds (110(8) August 2017)

Iberian Chiffchaff Phylloscopus ibericus has become an annual vagrant to Britain, but in some cases the identification of this subtle species remains extremely challenging. First-winter Iberian Chiffchaffs undertake a partial moult on the winter[...]

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