Dollarbird

The Oriental dollarbird is a bird of the roller family, named for the coin-shaped pale blue or white spots on its wings. It ranges from Australia to Korea, Japan and India. It is 27–32 cm long and dark brown with a heavy bluish-green sheen on the back and wing coverts. Ten subspecies are recognised (Wikipedia, general species account).

A 2018 study found the azure dollarbird of the North Moluccas nested within a clade of Oriental dollarbird subspecies (Wikipedia, general species account).