Hitherto treated as conspecific with T. poliocephalus, but for long regarded as the most aberrant in that assemblage (see HBW) and recently indicated as being genetically removed#R; differs in its pronounced sexual dimorphism, female strongly vs weakly different from male (olive-brown vs white crown and head sides) (3); male having dark band separating breast from belly vs no such band in other taxa (3); male with strongly vs either no or only moderately well-marked black and white undertail-coverts (1). Monotypic.
Food and feeding
Status and conservation
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