Traditionally considered to belong to species-group centred on O. bakkamoena (which see). Previously considered part of O. bakkamoena (sometimes under synonyms manipurensis and alboniger), a treatment still preferred by many authors, and it may intergrade with that species in Nepal; also, considered by some to be conspecific with O. lempiji, but differences in vocalizations suggest specific status. Race plumipes formerly treated as part of O. bakkamoena, but must belong with present species on morphological grounds#R. Formerly considered to include race ussuriensis of O. semitorques (which see). Indochinese population, tentatively included in nominate, may be closer to erythrocampe. Five subspecies recognized.
Food and feeding
Status and conservation
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