Black-winged Stilt

The black-winged stilt is a widely distributed, very long-legged wader of the avocet and stilt family. Adults are 33 to 36cm long, with long pink legs and a long, rather thin black bill. The birds are generally black above and white below, with a white head and neck. Males have a black back, often with a greenish gloss, while females' backs have a brownish hue (Wikipedia, general species account).

The sources read for the Bhutan guide are largely about how the stilts are divided into species, and give nothing on range, habitat, diet or breeding. Its occurrence in Bhutan is flagged for checking, and nothing further is stated.