Emberiza yessoensis
The Ochre-rumped Bunting, *Emberiza yessoensis*, is a small, elusive passerine of East Asian wetlands, typically measuring 13-14.5 cm in length and weighing 13-20 grams. Breeding males exhibit a striking black head and throat sharply delineated by a white malar stripe, contrasting with a chestnut-brown, heavily streaked back. A key diagnostic field mark for both sexes is their bright ochre-brown rump and uppertail coverts. Females and non-breeding males are more cryptically patterned, with st...
This species strictly inhabits lowland freshwater marshes, extensive reedbeds, and tall wet grasslands, almost always found close to water sources. They prefer dense herbaceous vegetation, rarely venturing into open areas.
Their diet primarily consists of seeds from various wetland plants and grasses, supplemented with insects and other invertebrates, especially during the breeding season for protein needs.
Ochre-rumped Buntings are highly secretive and primarily diurnal, spending much of their time hidden deep within dense wetland vegetation. Males establish territories and deliver their distinctive, hurried jingle song from exposed reed stalks or low perches to attract mates and deter rivals. Fora...
The Ochre-rumped Bunting has a restricted breeding range across eastern Asia. The nominate subspecies, *Emberiza y. yessoensis*, breeds primarily on the islands of Hokkaido and northern Honshu in Japan. The subspecies *Emberiza y. continentalis* breeds further west in northeastern China (Heilongj...
Near Threatened
- The Ochre-rumped Bunting is considered one of the most challenging bird species to observe in East Asia due to its preference for dense, inaccessible reedbeds. - Its defining characteristic, the bright 'ochre-rump,' is a crucial and often the only visible field mark that distinguishes it from o...