The green malkoha or whistling yellowbill (Ceuthmochares australis) is a species of cuckoo in the family Cuculidae.

In the forest it typically lives in the subcanopy at between 8–30 m. The green malkoha feeds primarily on insects, particularly caterpillars, beetles, grasshoppers and crickets; it will also take frogs, slugs, fruit, seeds and leaves.

It moves through the tangled vegetation with a series of small hops, snatching prey as it travels.

Two white and creamy eggs are laid in a nest that is a rough mass of sticks suspended around 2–5 m above the ground.

The green malkoha is an uncommon species and rarely observed due to its secretive behaviour.