Caption Group

Fig. 1. Distribution of Western Subalpine Curruca iberiae, Eastern Subalpine C. cantillans and Moltoni’s Warblers C. subalpina in Europe and North Africa. Western Subalpine Warbler and Moltoni’s Warbler are both considered monotypic, but there are detectable and consistent differences between breeding populations; Eastern Subalpine Warbler is polytypic, with two subspecies.

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