From wikipedia,
The Secretarybird or Secretary Bird (Sagittarius serpentarius) is a large, mostly terrestrial bird of prey. Endemic to Africa, it is usually found in the open grasslands and savannah of the sub-Sahara. Although a member of the order Accipitriformes, which also includes many other diurnal raptors such as kites,buzzards,vultures, and harriers, it is given its own family,Sagittariidae.