Radde's Warbler

Radde's warbler is similar in size to a willow warbler. The adult has an unstreaked brown back and buff underparts, with a very long, prominent whitish supercilium. The pointed bill is thicker than that of the similar dusky warbler, and the legs are paler, with feet that look large, reflecting the warbler's more terrestrial lifestyle. The sexes are identical, as with most warblers, but young birds are yellower below. (Wikipedia, general species account)

Radde's warbler breeds in southern parts of Central and Eastern Siberia as far east as Korea and Manchuria, in open deciduous woodland with some undergrowth and bushy woodland margins, often near water. It is strongly migratory and spends the winter in Bangladesh, Cambodia, Laos, Myanmar and Thailand, where it occupies forest fringes, thick scrub and bushy places near woodland. Like most Old World warblers it is insect-eating. (Wikipedia, general species account)