Main features: Medium (28cm); throat and breast white, but no white collar; head and rest of underparts chocolate brown. Wings, tail and back turquoise; bill large (6-7cm), red; feet red.
Female: brown parts not so dark
Juvenile: Duller; bill initially dark; fine dark scallops on white breast; lesser wing-coverts mottled black
Call: Described as a loud shrill whinnying kek-kek which trails off; a harsh repeated klip; a piercing staccato laugh.
In flight: Blue with wing tips black; white patch at base of primaries;