(syn. Chrysococcyx Ϯ African Emerald Cuckoo C. cupreus) Gr. αδετος adetos  free, unbound  < negative prefix α- a- ; δεω deō  to tie up; κοκκυξ kokkux, κοκκυγος kokkugos  cuckoo; "Bannerman (Ibis, 1912, p. 244) has shown that two species of Emerald Cuckoo are commonly confused, the typical one being resident in West Africa and the other dispersed over Africa, occurring to the southernmost parts of the continent as a migrant. The migrant must bear the name Chrysococcyx intermedius Hartlaub; it differs in having the tail shorter in proportion to the wing, and may therefore be separated as a new subgenus under the name of ADETOCOCCYX." (A. Roberts 1922); "Adetococcyx (subgenus) Roberts, Ann. Transv. Mus., 8, 1922, p. 219. Type, by monotypy, Chrysococcyx intermedius Hartlaub [= Cuculus cupreus Shaw]." (Peters 1940, IV, 29).

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Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 21 January 2019).