Ochre-rumped Bunting

The ochre-rumped bunting, also known as the Japanese reed bunting, is typically the richest-coloured of the reed buntings, with the pinkest legs and bill in winter. Adult males have a dark back, chestnut upperparts, black-and-buff stripes on the breast and sides, a brown nape and whitish sides to the neck. Females have a buffy submoustachial and throat, black malar stripes and a dark brown crown with pale streaking. Juveniles have a pale greyish-brown central crown stripe and a yellowish-brown rump. The calls are written as sur-swee-ik and tik. (Wikipedia, general species account)

It is found in Manchuria, Korea and Japan, in temperate grassland and swamps, and is threatened by habitat loss. Two subspecies are recognised: continentalis breeds in eastern Mongolia, northeast China and Ussuriland and winters in east China, while yessoensis breeds and winters in Japan and also winters in Korea. (Wikipedia, general species account)