the back seems white, although it is in reality black. Lateral tail-feathers with a spot of white near the tip of each web.
Length 21 inches, extent of wings 30; bill along the back 2⅓, along the gap 3; tarsus 2.
Adult Female. Plate LXVI. Fig. 2, 3.
The female resembles the male in colouring, but wants the vivid patch on the crest, which is wholly black.