Formicivora acutirostris
The Marsh Antwren (Formicivora acutirostris) is a small, striking antbird endemic to Brazil, belonging to the diverse Thamnophilidae family. Measuring approximately 11-12 centimeters in length and weighing 8-10 grams, this species exhibits clear sexual dimorphism. Males are characterized by their slate-gray upperparts, a distinctive black throat and breast patch, a prominent white supercilium, and white streaking along their flanks. Females present a warmer palette, with brownish upperparts, ...
Primarily inhabits dry scrublands, cerrado, caatinga, and semi-open woodlands, often along gallery forest edges or near watercourses at low to moderate elevations.
Feeds almost exclusively on insects and other small arthropods, meticulously gleaned from vegetation and leaf litter.
Marsh Antwrens are diurnal insectivores, typically observed singly or in pairs, actively foraging within the dense undergrowth. They employ a gleaning strategy, carefully picking insects and other small arthropods from foliage, twigs, and bark, often close to the ground. This species is monogamou...
The Marsh Antwren is endemic to Brazil, with a widespread but somewhat fragmented distribution across the eastern, central, and northeastern regions of the country. Its range extends through states including Bahia, Minas Gerais, Goiás, Tocantins, Mato Grosso do Sul, São Paulo, and Paraná. As a no...
Least Concern
- Despite its common name, the Marsh Antwren (Formicivora acutirostris) primarily inhabits dry scrub, cerrado, and caatinga, not extensive marshes. - Its scientific name, *acutirostris*, refers to its 'narrow bill,' a key adaptation for its insectivorous diet. - Males are easily identified by the...