White-crowned hornbill  (Aceros comatus)

The most noticeable feature of this fantastically bizarre looking bird is its white crown feathers which erect in a spiky crest. The white-crowned hornbill also possesses an ornamental casque on top if its bill, characteristic of many hornbills. The blackish casque is hollow and serves no function, but is believed to be the result of sexual selection. The head, neck, breast, gradual tail and tips of the wing feathers are white, while the rest of the plumage is black, with a metallic sheen to the upperparts. The large bill is black with a greenish-yellow wash at the base. The bare skin surrounding the eye and on the throat is a striking blue, and the eyes are pale yellow. Females are smaller than males, and are also distinguished by their black neck and underparts (2) (4).