A. O. Hume, 1874,
no locality = Kyauknyat, Tenasserim.
Hitherto treated as conspecific with G. glandarius and G. bispecularis. Differs from G. g. atricapillus and G. g. cervicalis in its blue-and-black barred area of middle of secondaries vs white (3); buffy-rufous vs grey-tinged whitish underparts (2); more extensive black on crown (narrower white supercilium) and nape (forming an upper black collar) (1); markedly shorter tail (allow 3); and apparently unique disyllabic or double-note whistled call (2). Differs from G. bispecularis in its black-streaked white vs plain buffy-rufous forehead (2); black vs plain buffy-rufous crown and nape (3); white vs whitish buffy-pink face and throat with clear division from upper breast (2); greyer upperparts (ns); larger bill (allow 1); and apparently unique double whistle (2)#R; however, G. b. oatesi, apparently known from three specimens and a small area of NW Myanmar, appears to represent a hybrid population, sharing characters of both species. Monotypic.
C & E Myanmar, S China (S Yunnan), Thailand and C & S Indochina.
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