Despite its wide range over much of Amazonia, from eastern Venezuela and the Guianas south and west to eastern Peru and northern Bolivia, the Black-bellied Cuckoo is a rather poorly known bird in terms of its natural history. Given a reasonable view, it is easily separated from the much more ubiquitous and more familiar Squirrel Cuckoo (Piaya cayana), which often shares the same habitat as the Black-bellied Cuckoo. In addition to the all-dark belly, the present species also has a red bill, blue-gray cap and yellow ocular skin, bright chestnut upperparts, and otherwise orange-buff underparts. The Black-bellied Cuckoo is a generally uncommon bird, usually found at mid to higher levels in tropical forest zones, although it occasionally ventures into savanna woodland, and principally feeds on insects. Virtually nothing is known concerning the species’ breeding biology.