High Quality Content by WIKIPEDIA articles! The Pacific Koel (Eudynamys orientalis), also known as the Eastern Koel, is a species of cuckoo in the Cuculidae family. It has often been considered conspecific with the Asian and Black-billed Koels, but they are increasingly treated as a separate species. Alternatively, the population breeding in Australia has been considered a separate species, the Australian Koel (Eudynamys cyanocephalus), with the remaining taxa then considered subspecies of the Asian Koel.