Recent phylogenetic study indicates that this species is part of a clade which contains also P. verticalis, P. flavicans and P. luconensis#R. Sometimes considered conspecific with P. flavicans (but recent reinforcement of split#R#R). Until recently was considered conspecific with P. mindorensis (see above), and previously with P. platenae, but molecular study#R indicates that those belong in a different clade. Races may represent two distinct species#R; further studies, using additional data and specimens, are required in order to clarify taxonomic status, especially of apparently intermediate forms in Samar and Leyte. Proposed race nesophilus (Catanduanes I) here considered synonym of whiteheadi; suluensis (Sulu Archipelago) included within nominate. Two subspecies currently recognized.
Food and feeding
Status and conservation
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