Pachycephala soror Sclater, PL, 1874

Male nominate race has crown, nape and side of head to below orbit black, upperparts dark olive-green; upperwing and tail dusky, all feathers edged olive; chin and throat white, band across upper breast and along side of throat joining back of head black, remainder of underparts yellow; iris dark red to dark brown; bill black; legs greyish to blackish. Female has crown grey- brown, side of head brown, upperparts olive- green, tail black, rectrices edged olive- green; throat white, faintly mottled with greyish, breastband yellowish- olive (broader than male´s and ill- defined), belly and undertail- coverts yellow. Juvenile is largely reddish- chestnut on body and on tips of wing- coverts and uppertail- coverts; immature like female, but retaining juvenile wing- coverts. Race octogenarii male has crown and site of head dark grey, breastband very narrow, rectrices edged olive, population in Fakfak Mts similar except for ochraceous posterior border of breastband; klossi has much broader breastband, with tail black in both sexes; bartoni has tail green with black shaft streaks; remota is similar to previous but somewhat larger, with underparts slightly richer yellow.