Hornbill

A bird in the family Bucerotidae, found mainly in tropical Africa and Asia. Hornbills have long, down-curved bills, often topped with a casque, and many species nest in sealed tree cavities.

Bucerotidae: The bird family comprising hornbills, with species native to tropical Africa and Asia. This is the family that defines hornbills taxonomically.
Cavity-nesting: Reproduction in which birds lay eggs and raise young inside enclosed holes, usually in trees. Many hornbills nest in tree cavities that the female seals during incubation.
Tropical forest restoration: The repair of degraded tropical forests through natural regeneration or active intervention. Protecting hornbills can restore seed dispersal by large fruit-eating animals.
Toucans: Neotropical birds in the family Ramphastidae, recognized by their large, often colorful bills. Toucans resemble hornbills in bill size but belong to a separate family and region.
Casque: A hollow or partly solid structure above the bill in some birds, especially hornbills. Its shape and development help distinguish many hornbill species.
Cooperative breeding: A social breeding system in which individuals besides the breeding pair help raise young. Helpers feed females and chicks in some hornbill species.
Keystone species: A species whose ecological effects are unusually large relative to its abundance. Some hornbills disperse seeds over distances and through habitats few other animals match.
Hoopoes: Distinctively crested birds in the family Upupidae, native to parts of Africa, Asia, and Europe. Hoopoes are related within the broad order Bucerotiformes but lack hornbill casques.
Zygodactyl foot: A bird foot with two toes facing forward and two facing backward. Hornbills use this gripping arrangement to move along branches and handle food.
Frugivory: A diet consisting largely or entirely of fruit. Fruit is a major food source for many hornbills, which disperse its seeds.

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