Length 23 inches; extent of wings 56; bill along the ridge 2; tufts on the head 3.
Adult Female. Plate LXVI. Fig. 2.
The female is considerably larger than the male, and is duller and lighter in colouring, although the distribution of the tints is similar. The white of the chin is less pure, and the broad band of the same colour on the fore neck is wanting.