The true koels, Eudynamys, are a genus of cuckoos from Asia, Australia and the Pacific. The name combines the Ancient Greek eu meaning "fine" with dunamis meaning "power" or "strength".

1/ Asian koel (Tu hú, Eudynamys scolopaceus)
The specific epithet scolopaceus is Modern Latin meaning "snipe-like" from Latin scolopax meaning "snipe" or "woodcock".