Radde's Warbler

Radde's warbler is a leaf warbler about the size of a willow warbler, with an unstreaked brown back, buff underparts, a long whitish eyebrow and a bill thicker than a dusky warbler's, with paler legs. The sexes look alike and young birds are yellower below. It is fairly terrestrial with large feet and gives a soft 'chick' call (Wikipedia, general species account).

It breeds in open deciduous woodland with undergrowth, often near water, in southern Central and Eastern Siberia east to Korea and Manchuria, building a low nest in a bush with about five greyish, olive-mottled eggs. It is strongly migratory and winters in forest fringes and scrub in South-east Asia, including Bangladesh. The source does not name Nepal. The specific name honours the astronomer Ludwig Schwarz (Wikipedia, general species account).