Taxonomy
The taxonomy of the common koel complex is difficult and remains a matter of dispute, with some only recognizing a single species (Common Koel, Eudynamys scolopaceus, with melanorhynchus and orientalis as subspecies), two species (Common Koel, Eudynamys scolopaceus, with orientalis as a subspecies, and Black-billed Koel, Eudynamys melanorhynchus) or three species (as done below).
- Genus Eudynamys - true koels
- Asian Koel, Eudynamys scolopaceus
- Black-billed Koel, Eudynamys melanorhynchus
- Pacific Koel, Eudynamys orientalis
- Australian Koel, Eudynamys (orientalis) cyanocephalus
- Long-tailed Koel, Eudynamys taitensis
- Henderson Island Koel, Eudynamis cf. taitensis - prehistoric
Read more about this topic: Koel