Bucerotidae (Hornbills) Hornbills are named because of their very large bills with a casque on top. To support their large bill, the first two neck
vertebrae are fused together. Hornbills bear a resemblance to toucans, but the two are very unrelated, since hornbills are
Old World birds of Africa, tropical areas of Asia and Australia, whereas Toucans are New World birds of South
America. [eng]