They mostly feed on fruits and insects. Their calls are loud. These brood parasites lay their eggs in the nests of other bird species for them to raise as their own.
- Genus Eudynamys – true koels
- Black-billed Koel, Eudynamys melanorhynchus
- Asian Koel, Eudynamys scolopaceus
- Long-tailed Koel or Long-tailed Cuckoo, Eudynamys taitensis
- Henderson Island Koel, Eudynamis cf. taitensis – prehistoric
Species Research by Sibylle Johnson
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