Appearance
It is a dull bird, grey or brownish above and whitish below, with little yellow in the plumage, and the buff-white supercilium is often longer than in the western subspecies. It has a higher pitched ''suitsistsuisit'' song and a short high-pitched ''cheet'' call. It is sometimes considered to be a full species due to its distinctive plumage and vocalisations, being similar to ''P. s. sindianus'' in these respects.Status
It is also regularly recorded in western Europe in winter, and it is likely that the numbers involved have been underestimated due to uncertainties over identification criteria, lack of good data and recording policies .Because of their unfamiliar appearance, British records in the 1950s and 1960s were originally thought to be greenish warblers, and accepted as such by BBRC, the national rarities committee, until the records were reviewed in the 1980s.
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