Philippine Bulbul (Hypsipetes philippinus)

Previously placed in Ixos (see H. rufigularis, above); often treated as conspecific with H. rufigularis (which see for differences). Recent molecular analyses indicate considerable genetic structure within present species, but the finding that guimarasensis, almost indistinguishable from nominate, is sister to H. rufigularis and H. everetti#R is counterintuitive and needs independent confirmation (although voice somewhat divergent); the finding that race mindorensis is sister to H. siquijorensis#R somewhat more plausible but again requires corroboration (voice generally like that of nominate philippinus). Original species name philippensis invalid, as preoccupied. Five subspecies provisionally recognized.