The black-casqued hornbill (''Ceratogymna atrata'') or black-casqued wattled hornbill, is a species of hornbill in the family

Bucerotidae Hornbills (Bucerotidae) are a family of bird found in tropical and subtropical Africa, Asia and Melanesia. They are characterized by a long, down-curved bill which is frequently brightly coloured and sometimes has a casque on the upper mandibl ...

. It is widely spread across the African tropical rainforest. Male and female black-casqued hornbill differ in physical appearance and are therefore an example of

sexual dimorphism Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most an ...

. The males are larger, have black feathers on their head, and have a larger

casque Casque is a French word for helmet. It can refer to: * Casque (anatomy), an enlargement on the beaks of some species of birds, including many hornbills *Hornbill ivory, the casque of the helmeted hornbill, collected as a decorative material * S. C ...

. The females have brown hood of feathers.

References

External links

Audio file of the sounds of the black casqued hornbill
Freesound black-casqued hornbill Birds of the African tropical rainforest black-casqued hornbill Taxonomy articles created by Polbot {{Coraciiformes-stub