Körpergewicht
However, it is some 40 percent larger than the savanna hawk. This gives it a total length of , including of tail; its wingspan would have been . Body weight is estimated at . This makes it quite a heavy raptor, slightly greater than the present-day secretarybird of Africa. This African raptor shares the long legs of "B. daggetti" and their lifestyles may have been similar (see "Ecology" below).