Has been proposed, on basis of molecular data suggesting paraphyly involving C. palawanensis, that nominate and race septentrionalis should be treated as separate species#R; however, characters distinguishing septentrionalis (slight yellow border to black “bib”, yellowish wash to crown, average smaller size, voice) all minor, intermediate forms with nominate exist in S of range#R, and the provenance of sampled material in molecular study has been questioned#R, so further work needed. Two subspecies recognized.
Food and feeding
Status and conservation
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