The trumpeter hornbill (Bycanistes bucinator) is a medium-sized hornbill, with length between 58 and 65 cm (23 and 26 in), characterized by a large grey casque on the bill, smaller in females. The eyes are brown or red, with pink surrounding skin. Body mass is between 0.45 and 1 kg (0.99 and 2.20 lb). It is similar to silvery-cheeked hornbill. Distinguishing features include an all-black back, white belly and white underwing coverts (in flight, wings present white tips), and red facial skin.
The trumpeter hornbill is a gregarious bird, usually living in groups of two to five individuals, although sometimes as many as fifty. This hornbill is a locally common resident of the tropical evergreen forests of Burundi, Mozambique, Botswana, Congo, Kenya, the Caprivi strip of Namibia and eastern South Africa, where it feeds on fruits and large insects. Like other hornbills, the females incubate four to five white eggs while sealed in the nest compartment.