A large cuckoo endemic to Sulawesi. Long tail and red eye. Male is all black; females have a brown back andbarred underparts with white stripe on the face. Found in forest and edge where it hides in dense canopy and is difficult to see. The only koel on Sulawesi. Male separated from other black birds by long, pointed black tail. Female from other cuckoos by white stripe on face and barring. Voice a typical “koel!” call, or short series of rising and falling “woo” notes.