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Western Sublapine Warbler - Sylvia cantillans cantillans - immature. Length 12-13cm. A secretive bird, reminiscent of a Dartford Warbler in size, shape and habits. Adult Male has blue-grey upperparts, except for the brownish wings. The throat and breast are reddish, but note the striking white 'moustache'; the belly is white and note also the red orbital ring. Adult Female and Juvenile have much duller colours than the male, although a hint odf a pale 'moustache' can usually be discerned. Utters a sharp 'tchett' alarm call. The Western Subalpine Warbler breeds in southern Europe and winters in Africa; vagrants (a dozen or so in a good year) occur mainly at migration times, typically in coastal scrub.