About Ceratogymna atrata (Temminck, 1835)
The black-casqued hornbill (Ceratogymna atrata) is a large bird that is mostly black in color, with bare blue skin and wattles around its eyes. Adults are typically 60 to 70 centimeters (24 to 28 inches) long. It can be told apart from the similar yellow-casqued hornbill by the white scales present in its plumage. As a member of the hornbill family, it is easily identified by the namesake casque structure that develops on its beak as the bird matures. Like many bird species, the black-casqued hornbill shows sexual dimorphism. Males are larger, have black heads, and grow a larger casque, while females have a brown hood of feathers. Both males and females have a powerful "braying" call that can be heard from over 2 kilometers away. Males, which are generally louder, also produce other calls, including a resonant squawk and a soft chuckling alarm call.
