martial eagle polemaetus bellicosus large sub-saharan africa species of booted eagle subfamily aquillinae immature

africa african animal beautiful bellicosus bird birds birdwatching blue booted branch brown claw diurnal eagle eagles etosha fauna feather hunt hunter large leaf martial namibia national natural nature outdoor park perched plumage polemaetus powerful predator prey raptor safari south subsaharan the threatened travel tree vulnerable white wild wildlife