Black-casqued hornbill
The black-casqued hornbill (Ceratogymna atrata) or black-casqued wattled hornbill, is a species of hornbill in the family Bucerotidae. It is widely spread across the African tropical rainforest. The population is decreasing. Male and female black-casqued hornbill differ in physical appearance and are therefore an example of sexual dimorphism. The males are larger, have black feathers on their head, and have a larger casque. The females have brown hood of feathers. The black-casqued hornbill is known for its intelligence. They are most commonly found in pairs, but small groups of up to 5 are also somewhat frequent. They feed on insects and at least 19 species of fruit. 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