white-backed black-tit Melaniparus leuconotus

An unusual tit that is mostly black with a pale back. Males have a bright white back and females and immatures a buff-colored one. Found in montane forest and woodland, usually in pairs or small groups, and readily joins mixed flocks. Similar to White-shouldered Black-Tit, but easily separated by the white back and black wing. The calls are typical of tits, but softer and gentler, including high-pitched “sit” notes and scratchy notes. Song is highly variable, but often contains repeated phrases of musical whistles.