List of hornbills

Hornbills are birds in the families Bucerotidae and Bucorvidae. There are currently 62 extant species of hornbills recognised by the International Ornithologists' Union, two in Bucorvidae and 60 in Bucerotidae. Many species of fossil hornbills are known from the Miocene onwards; however, their exact number and taxonomy are unsettled due to ongoing discoveries.

Conventions
Conservation status codes listed follow the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Range maps are provided wherever possible; if a range map is not available, a description of the hornbill's range is provided. Ranges are based on the IOC World Bird List for that species unless otherwise noted. Population estimates are of the number of mature individuals and are taken from the IUCN Red List.

This list follows the taxonomic treatment (designation and order of species) and nomenclature (scientific and common names) of version 13.2 of the IOC World Bird List. Where the taxonomy proposed by the IOC World Bird List conflicts with the taxonomy followed by the IUCN or the 2023 edition of The Clements Checklist of Birds of the World, the disagreement is noted next to the species's common name (for nomenclatural disagreements) or scientific name (for taxonomic disagreements).

Classification
The International Ornithologists' Union (IOU) recognises 62 species of hornbills in across two families and fifteen genera. This list does not include hybrid species, extinct prehistoric species, or putative species not yet accepted by the IOU.


 * Family Bucorvidae
 * Genus Bucorvus: two species
 * Family Bucerotidae
 * Genus Tockus: ten species
 * Genus Lophoceros: eight species
 * Genus Bycanistes: six species
 * Genus Ceratogymna: two species
 * Genus Horizocerus: two species
 * Genus Berenicornis: one species
 * Genus Buceros: three species
 * Genus Rhinoplax: one species
 * Genus Anthracoceros: five species
 * Genus Ocyceros: three species
 * Genus Anorrhinus: three species
 * Genus Aceros: one species
 * Genus Rhyticeros: six species
 * Genus Rhabdotorrhinus: four species
 * Genus Penelopides: five species