Dollarbird

The oriental dollarbird is a bird of the roller family, so named because of the distinctive pale blue or white, coin-shaped spots on its wings. It is 27–32cm long and dark brown, heavily washed with a bluish-green sheen on the back and wing coverts, with a light belly and undertail coverts and glossy bright blue on the throat and undertail (Wikipedia, general species account).

It can be found from Australia to Korea, Japan and India. At least two subspecies are migratory: one breeds in north-eastern Asia and winters in south-eastern Asia, and another breeds in northern and eastern Australia between September and April and winters in New Guinea (Wikipedia, general species account).