Identification: Adult is distinctively larger than the other two Hawk-Cuckoo species and has slaty-grey head, brownish-grey upperparts, rufous breast-patch, whitish rest of underparts with dark bars and long tail with broad dark tail-bands. Juvenile resembles adult but has darker brown upperparts with rufous bars, pale rufous nape with dark brown streaks and whitish underparts with bold dark brown drop-like streaks on breast.