White-browed Wagtail

The white-browed wagtail, or large pied wagtail, is the largest wagtail, 21cm long, conspicuously patterned black above and white below, with a prominent white brow, shoulder stripe and outer tail feathers. Unlike the white wagtail it never has white on the forehead. The female has the black less intense than the male (Wikipedia, general species account).

It is a resident breeder endemic to the Indian subcontinent, common near small water bodies, and has adapted to urban environments where it often nests on rooftops. It is usually seen in pairs or small groups near open water, and the usual call is a wheezy 'wheech'. The breeding season is March to October, with normally four eggs. The account opened does not name Bhutan, so its occurrence there is flagged for checking.