Свистун біяцький Pachycephala melanorhyncha

Medium-sized bird of forest on Biak Island. Warm brown above, paler below, orange-brown face and rufous flight feathers. Thick black bill and large eye. Previously thought to be a subspecies of Little Shrikethrush, but now placed with the whistlers. No similar species in range. Very skulking and much more often seen than heard. Voice, various short, spaced whistles interspersed with rapidly repeated “chew” notes.