The Chestnut-breasted Cuckoo occurs in New Guinea, the Aru Islands, and northeastern Australia. Adults have gray upperparts and chestnut underparts.
Adult males and females have similar plumage: a slate-gray head, back, wings, and tail, chestnut underparts, white tail bars, and a yellow eye-ring. Juveniles are paler.
It searches for insects, especially caterpillars and beetles, in the canopy. Males sing to mark territory, and females lay eggs in other birds' nests. Reported host species differ between New Guinea and Australia.
An extinction-risk assessment has not been added yet.