The Flores hawk-eagle (Nisaetus floris, earlier under the genus Spizaetus), is a species of 75–79 centimetres (30–31 in) long bird of prey in the Accipitridae family. Adults have dark brown upperparts, a brown tail with six bars, a white patch in the wings that is visible in flight, white underparts, and a white head with fine brownish streaks on the crown (many books erroneously illustrate adults with largely brown heads). It has traditionally been treated as a subspecies of the changeable hawk-eagle; at least in part because of confusion over the true adult plumage of the Flores hawk-eagle, which resembles the juvenile of the changeable hawk-eagle. Unlike that species, adult and juvenile Flores hawk-eagles are quite similar.