Natively, the 54 hornbill species inhabit the tropical zone of Africa and Asia. They have a great curved disproportionate bill and hollow casque (except the helmeted species) above the bill. Except for spotted white wing coverts and a colored beak, these birds are mostly black-white, grey, or brown feathered. They eat worms, insects and fruit (figs preferred) and nest in tree hollows uniquely decorated at the opening with wood pieces, dried grass, dried mud and its dung.