The Harpy Eagle is a Neotropical species of eagle. It is sometimes known as the American Harpy Eagle to distinguish it from the Papuan Eagle which is sometimes known as the New Guinea Harpy Eagle or Papuan Harpy Eagle. It is the largest and most powerful raptor found in the Americas, and among the largest extant species of eagles in the world. It usually inhabits tropical lowland rainforests in the upper canopy layer. Destruction of its natural habitat has seen it vanish from many parts of its former range, and it is nearly extirpated in Central America. In Brazil, the Harpy Eagle is also known as Royal-Hawk The upper side of the Harpy Eagle is covered with slate black feathers, and the underside is mostly white, except for the feathered tarsi, which are striped black. There is a broad black band across the upper breast, separating the gray head from the white belly. The head is pale grey, and is crowned with a double crest. The upper side of the tail is black with three gray bands, while the underside of it is black with three white bands. The iris is gray or brown or red, the cere and bill are black or blackish and the tarsi and toes are yellow. The plumage of male and female is identical. The tarsus is up to 13 cm long.