The Silvery-cheeked Hornbill comes from the eastern part of sub-Saharan Africa.
Both male and female have mainly black iridescent plumage with a white back, thighs and under tail ends, a silvery-grey wash to the face and an ivory-coloured casque (horn above bill).
The female (above) has red skin around her eyes. Although the casque on both (and other hornbills) looks as if it is broken, it isn't -- it is how the casque grows.
The casque (shorter on the female) and the iridescent plumage with green metallic sheen
Other Black & White "Bycanistes" Hornbills
The TRUMPETER HORNBILL, Bycanistes bucinator, comes from central Africa, from Kenya in the east through to Namibia in the southwest.
Named after its braying call, it is related to the Silvery-cheeked, but has a black back and a white belly and under wing-tips.
BLACK & WHITE CASQUED HORNBILL,
Bycanistes subcylindricus, comes from central and West Africa. Also called the Grey-cheeked Hornbill, it is related to the Silvery-cheeked but has a white lower body and wings.