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The Crested Serpent Eagle is a medium-sized bird of prey that is found in forested habitats across tropical Asia. They fly over the forest canopy on broad wings and tail have wide white and black bars. They call often with a loud, piercing and familiar three or two-note call. They often feed on snakes, giving them their name and are placed along with the "Circaetus" snake-eagles in the subfamily "Circaetinae".