Slaty-backed Forktail

The slaty-backed forktail is a slim, medium-sized forktail found in the central and eastern Himalayas, the Indian subcontinent, southern China and continental south-east Asia. It is told from similar species by its slate-grey forehead, crown and mantle, and the sexes look alike. The tail is long and deeply forked, banded black and white, with a white rump and a white bar across the primaries and mostly white remaining plumage. (Wikipedia, general species account)

It frequents the edges of fast-flowing streams and rivers, hopping among rocks or flying out over the water to hunt small invertebrates, and occasionally strays to the edges of roads and trails. It is generally solitary, sometimes in pairs or family groups in the breeding season. It breeds February to July, laying 3–4 pinkish, bluish or white eggs that both sexes incubate, and in southern China it is estimated at 400–1,800 m. One of its calls has been mistaken for that of Blyth's kingfisher. (Wikipedia, general species account)