Possibly close to M. longipennis; the two are often included in the “grey antwren assemblage” (see M. axillaris). Pending further study, geographical ranges of races follow those given by previous authors, but some races may not be diagnosable. On basis of plumage, races fall into two groups: nominate and berlepschi (combined ranges E Peru and N Bolivia E in Brazil to R Tapajós), with male black-throated; and cinereiventris, pallida and omissa (NE Amazonia E to Guianas, Maranhão S to R Tapajós), with male grey-throated. However, in recent analysis of sonograms, although fairly strong differences were found between these two groups, song of grey-throated omissa was more closely aligned with those of black-throated races than with cinereiventris and pallida; further investigation required. Five subspecies recognized.
Food and feeding
Status and conservation
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