Size: L: 45 cm. Wt: 700-1100g. Sexually dimorphic. This species is not seasonally dimorphic.

Male: head dark metallic purple, with white crescent in front of eye; eye yellow; bill dark; breast, belly and flanks white; back black, with white wing patch and prominent row of white spots.

Female/Eclipse Male: head dark purplish-brown; bill orange; breast greyish; back and flanks mottled grey-brown; tail dark; white wing patch.

Juvenile: young males similar to females, but with faint white crescent on face, and white breast and flanks; young females similar to females, but with black on bill.