Diederik cuckoo either "cuprea" (coppery) or "capensis" (of Cape of Good Hope). The English name is an onomatopoeic rendition of its call. Diederik cuckoo The Diederik cuckoo ("Chrysococcyx caprius"), formerly dideric cuckoo or didric cuckoo, and sometimes called Diederik's cuckoo, is a member of the cuckoo order of birds, the Cuculiformes, which also includes the roadrunners and the anis. The diederik cuckoo is a smallish cuckoo at 18 to 20 cm. Adult males are glossy green above with copper-sheened areas on the back and whitish underparts. They have a broken white eye-stripe and a short, green malar stripe. All remiges have three
Black-billed cuckoo Black-billed cuckoo The black-billed cuckoo ("Coccyzus erythropthalmus") is a New World species in the Cuculidae (cuckoo) family. The scientific name is from Ancient Greek. The genus name "kokkuzo", means to call like a common cuckoo, and "erythropthalmus" is from "eruthros", "red" and "ophthalmos", "eye". It is very similar and overlaps in range with the closely related yellow-billed cuckoo. A distinguishing characteristic of family Cuculidae is laying eggs in the nests of other birds. Although many cuckoos are obligate brood parasites, "C. erythropthalmus" often incubate their own chicks. Adults have a long, graduated brown tail and a black, slightly downcurved bill.