Marabitanas, Rio Negro, Amazonas, Brazil.
Appears closest to M. urosticta and possibly M. menetriesii; the three are often grouped with similarly plumaged species in the “grey antwren assemblage” (see M. axillaris). Although plumage and vocal differences, and some genetic studies#R#R, suggest that some races may be separate species, recent analysis of vocal characteristics revealed a gradual change in the song from one race to the next (starting with nominate in N of range and proceeding in anticlockwise direction through Amazonia to paraensis); thus, at the two extremes of the range, nominate song sounds very different from that of paraensis#R. Geographical ranges of races given below are tentative, based mainly on previously published statements. Full review of all parameters required. Six subspecies recognized.
Food and feeding
Status and conservation
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