A large cuckoo, distinctive in all plumages, but usually secretive, keeping to the interior of dense trees in many habitats, even inner cities. Adult males glossy black with dull lime-green bill; females and immatures blackish brown with white dots on the wings and strong streaking on head and throat. Adults have ruby-red eyes. Females lay eggs in the nests of other large birds, including crows, shrikes, and starlings. Song is a loud, persistent “ko-EL!” similar to a peacock’s call.