upper Rio Purus, Brazil.
Closely related to and sometimes considered conspecific with G. leucotis (and was initially presumed to represent female of that form), although no intermediate forms documented despite the fact that both occur on R Ucayali, in Peru. Differs in its lack of white cheek patch (3); notably longer bill and tail (effect size for tail 3.18, score 2), although wing length very similar (hence not co-varying with size); shade paler chestnut on dorsal area (1); reportedly different voice (HBW), although this has been denied#R (ns); and seemingly parapatric distribution (3). Monotypic.
E Peru (Madre de Dios, Puno, upper R Ucayali) to W Brazil (upper R Juruá and R Purus) and N Bolivia (Beni, Pando).
Food and feeding
Status and conservation
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