World Bird List

Species factsheet
Yellow-billed Malkoha (Rhamphococcyx calyorhynchus)

Order: Rhamphococcyx calyorhynchus
Family: Cuckoos (Cuculidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
calyorhynchus n, e and se Sulawesi, Togian Is.
meridionalis c and s Sulawesi
rufiloris Butung I. (off Sulawesi)
Annoncer