- Order: Passeriformes
- Family: Thamnophilidae
São Gonçalo dos Campos, Bahia, Brazil; 23 December 2014 © Anselmo d`Affonseca
The Pectoral Antwren’s general morphology is typical of the genus, although males are readily distinguished from any other species of Herpsilochmus within the species’ northeast Brazilian range by virtue of the obvious black pectoral marking, while females are almost equally distinctive, having olive upperparts with a rufous crown, and uniform dull buff underparts, brightest on the breast. Considered globally threatened, on account of ongoing habitat loss and its fragmented distribution, the Pectoral Antwren possesses an unusually disjunct range, in northeast Maranhão, eastern Rio Grande do Norte, Sergipe, Paraíba, and northeastern Bahia, in which state it remains fairly common locally. The species appears to require a reasonably well-developed understory, but will otherwise utilize a variety of forest types, including gallery woodland, semi-deciduous forest, and tall caatinga.
. 2010. Pectoral Antwren (Herpsilochmus pectoralis), Neotropical Birds Online (T. S. Schulenberg, Editor). Ithaca: Cornell Lab of Ornithology; retrieved from Neotropical Birds Online: http://neotropical.birds.cornell.edu/portal/species/overview?p_p_spp=382451