- Turdus boulboul
27–29 cm (10½-11½ in)
- Black plumage with pale greyish panel on greater secondary coverts and secondaries
- Orange bill
- Yellow eye-ring
- Yellow legs
- Olive brown with a paler rufescent wing-panel
- Yellow bill
Sometimes males can have white wing-panels.
Oak and rhododendron forest with thick ground vegetation, also tall conifer forests, clearings and dry scrub on open hillsides. Usually in thicker woods than similar White-collared Blackbird.
Shy and quick to take flight when disturbed. Hops on the ground in typical thrush fashion.
Feeds on invertebrates, snails, slugs, earthworms, also fruit and berries.
Breeds from March to August. The nest is a cup of grass, leaves, moss and lichens, placed in a fork of a tree, close to the trunk around 2 to 5 m above the ground. 3 to 4 eggs are laid.
Altitudinal migrant, found in the lowlands in winter, then sometimes in flocks associated with other thrushes.
Song recorded in Kalatop Sanctuary, Himalayan Forest (2417 meter/7930 ft), Upper Dalhousie, Dist. Chamba, Himachal Pradesh, India; June-2009.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017, with updates to August 2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- BirdForum Opus contributors. (2021) Grey-winged Blackbird. In: BirdForum, the forum for wild birds and birding. Retrieved 27 January 2021 from https://www.birdforum.net/wiki/Grey-winged_Blackbird