Amazonian Streaked-Antwren Myrmotherula multostriata Scientific name definitions

The Amazonian Streaked-Antwren is largely confined to seasonally flooded lowland forests south of the Amazon, although there are small extensions of its range to the north bank, especially in the west and center of Amazonia, where the species locally reaches as far north as southernmost Venezuela. For long considered a subspecies of the Guianan Streaked Antwren (Myrmotherula surinamensis), with the combined species known simply as the Streaked Antwren, there is virtually no geographical overlap between these sister-species, which are best differentiated by their vocals (although differences between their loudsongs are not marked), and to a lesser extent in plumage. The Amazonian Streaked-Antwren has recently been discovered far to the southeast of its previously known range, in Mato Grosso do Sul, southern Brazil, in Chiquitano dry forest.

Locally in SE Colombia, S Venezuela (extreme W Amazonas), and from E Ecuador and NE & E Peru E across C Brazil (E to W Maranhão and N Tocantins, extending N of R Amazon only in area W of lower R Negro and also NE of Manaus) and S to Mato Grosso and NW & NE Bolivia.

Loudsong an unmusical rattle or trill, first rising in intensity and pitch and then slowing slightly, similar to that of M. surinamensis but typically slightly slower in pace. Stereotyped call a rising and falling series of short, song-like notes, differing from that of M. surinamensis in that notes are much longer and pace much slower. Call a flat complaining note, often in a doublet with second note shorter.