Zamboanga, Mindanao, Philippines.
Has been treated as conspecific with O. atrogularis and O. castaneiceps. Differs from former in marked plumage characters and from latter (with or without the inclusion of O. chloronotus) genetically#R and in its rufous mask and grey crown vs rufous crown (3); less extensive white-on-slate streaking on breast of respective males (1); smaller size, with markedly shorter tail (2)#R; and wholly different song, a long rattling series that typically accelerates and rises slightly in pitch, with many more repeated notes (3) and faster pace (2)#R. Two subspecies recognized.
Food and feeding
Status and conservation
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