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 Australasia. Also similar to Plaintive Cuckoo, which is much more richly-colored. 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.
https://ebird.org/species/brucuc1?siteLanguage=en_PH
The brush cuckoo is a member of the cuckoo family. The brush cuckoo is native to Malesia, New Guinea, the Solomon Islands and northern and eastern Australia. It is a grey-brown bird with a buff breast. Its call is a familiar sound of the Australian bush.