La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Moult and ageing of Isabelline Shrikes
Auteurs :	Yosef Kiat, Auteur ; Yoav Perlman, Auteur
Type de document :	Article
Dans :	British Birds (109(3) MAR 2016)
Article en page(s) :	157-168
Résumé :	The extent, duration and timing of post-juvenile, post-breeding and pre-breeding moults of two members of the Isabelline Shrike Lanius isabellinus complex - 'Daurian Shrike' L i. isabellinus and 'Turkestan Shrike' L i. phoenicuroides - are discussed. Using data from museum specimens and field photographs, significant differences were found in the timing and extent of the first pre-breeding moult. In both forms, pre-breeding moult occurs earlier in adults than in juveniles, while Daurian moults earlier and more rapidly than Turkestan. These differences are related to migration strategy - chiefly timing, distance travelled and conditions on the wintering grounds.

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