African grey hornbill
Male is the only small hornbill in the region to have a dark bill with a creamy stripe at the base and a casque. The top of female's bill is pale yellow and the tip maroon.
Thornveld and dry, broad-leaved woodland.
A soft, plaintive whistling, 'phee pheeoo phee pheeoo'; in calling display the bill is held vertically and the wings are flicked open on each note.