A medium-sized brown owl with a rounded head and yellow eyes. Head and upperparts dark brown, with indistinct scattered pale markings above. Chest and belly white with prominent dark streaking. Juvenile shows bolder pale markings above and less heavy streaking below. Occupies forest and more open areas with scattered trees. Confined to Manus. Distinctive: one of only two owl species present on Manus, the other being the very different Manus Masked-Owl, a type of barn-owl. Manus Boobok gives a frog-like song of repetitive rough, curt “grrr” notes.