Sahul Brush Cuckoo Cacomantis variolosus

A medium-sized cuckoo, with a warm buff colored chest and belly. Gray eyering and heavily barred tail. Lack of a yellow eyering separates it from Fan-tailed Cuckoo, with which it overlaps in Australia and New Guinea. Calls frequently with an exhaustive series of separate whistles that fall in pitch and speed. Also does the remarkable "brain-fever-bird," a call that is repeated faster and faster.