The downy young are mainly whitish with grey bills and blackish facial skin. The blood pools under the nail, giving a reddish, brownish, blueish, or grey/blackish discoloration. The larvae show whitish to blackish bands. The upperparts are generally a mottled pale and blackish colour. The juvenile is mostly a mottled dark brown with blackish coloration on the head. The streaking is usually blackish or dusky brown or, sometimes, rufescent-brown. This is a large eagle with brown upperparts and blackish flight feathers and tail. The foot-fringe is pale, with a row of minute submarginal blackish tubercles. The underside is dark glossy green shading into blackish under the tail. Hair - Blackish or very dark brown. He described the moth as having blackish brown hind wings. Immature berries are green, turning white and then blackish purple. The feet are orange or yellow with blackish claws. The hind wings are red with a blackish fringe. The body is blackish or dark green in colour.