Biak Monarch Symposiachrus brehmii

A rare, medium-sized bird of lowland forest on Biak Island. Pale yellow belly and undertail, black chest and upperparts, except for large pale yellow patches on the wing and an irregular triangular shape behind the eye. Often joins mixed species flocks where it forages for insects. Adult is unmistakable on Biak. Song, a series of descending whistles “poo piuu piuu piuu piuu!”. Call, harsh rasps.