Males are noticeably larger than females.
Their heads, backs, bellies, and tails are blackish with green metallic highlights. There is a narrow white neck band separating the black head from the brown breast. The female's breast feathers are a rich chestnut, the male's are a paler cinnamon. The colorful wings have black primaries, metallic green secondaries, chestnut tertials, and white upper and under wing coverts. Females have rings of white feathers around the eye and the base of the bill.