Santo Amaro, Reconcavo da Bahia, Brazil.
Suggestion that this species may not belong in present genus (on grounds of sexual plumage dimorphism) refuted by genetic data#R. Hitherto treated as conspecific with M. cinerea and M. parambae (which see). Apparently close to M. olallai (which see). Proposed form Serpophaga araguayae, based on single specimen from SW Tocantins (Bananal I), in Brazil, shown to be referable to present species#R. Monotypic.
NE, S & SE Brazil (E Maranhão to Pernambuco, S to S Mato Grosso and N Rio Grande do Sul), Paraguay, SE Bolivia and extreme NW & NE Argentina.
Food and feeding
Status and conservation
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