Adult male: the glossy black body, with a greenish iridescence, contrasts with a brown head. The eyes are dark; the bill and legs are black. Adult female: dull brownish throughout, with darker ...

Length 4.8". The chestnut color of the back is unique, but it varies in intensity. The cap is dark brown, shading to black at its lower edge from the bill through the eye; the cheek is white ...