Hornbill, a large bird of tropical Africa and southeastern Asia. There are 45 species, ranging in length from one to five feet (0.9 to 1.5 m). The hornbill is named for its large, curved bill topped with a bony horn, or casque. The bird inhabits savannas and woods, and feeds on insects, fruit, and small reptiles. At nesting time, the male seals the female and her eggs in a hole in a tree. The male leaves a small opening through which he regurgitates food for the female. The female emerges after the young have hatched; the young remain in the nest until they can fly. The yellow-billed hornbill is found from Ethiopia to South Africa. It is about 17 inches (43 cm) long with black-and-white feathers and a bright yellow bill.

Hornbills belong to the hornbill family, Bucerotidae. The yellow-billed hornbill is Tockus flavirostris.