Male and female plumage:
Pearl-white with black markings. Head and neck white with dense black stripe down middle of each feather, free from black edgings or black tips. Saddle pearl-white. Tail feathers and tail converts glossy green-black, the coverts laced or not with white. Primaries black, or black edged with white; secondaries black on inner edge, white outer. Remainder of plumage entirely white, of pearl-grey shade, free from ticking. Undercolour either slate, blue-white or white.