The Sahul Brush Cuckoo often waits quietly on a branch for hairy caterpillars and other insects. It lays eggs in other birds’ nests, leaving the hosts to raise its young.
The back and wings are grey-brown; the head and chin are grey. It has a white shoulder tip, buff underparts, and pale notches on the underside of the tail. It is about 22–26 cm long.
It often sits still alone or in pairs and pounces on passing insects. In breeding, it lays one egg in another bird’s nest; the host raises the chick. Birds in southern Australia move north in winter.
An extinction-risk assessment has not been added yet.