Grey-winged Blackbird

The grey-winged blackbird is a large thrush, 28 to 29cm long and 88 to 111g, found in the mountains of southern and eastern Asia from the Himalayas to northern Vietnam. Its habitat is the middle altitudes of subtropical or tropical moist montane forests, mostly at 1,800 to 2,700m, occasionally down to 1,200m in winter and up to 3,300m in summer (Wikipedia, general species account).

It shows distinct sexual dimorphism: males are black with faint pale fringes on the belly and a broad grey patch on the wing coverts, secondaries and tertials, with a bright yellow bill and yellow eye ring, while females are plain brown with only a hint of paler brown on the wings, a dull yellow to brownish bill and a greyish eye ring.