Herpsilochmus atricapillus
The Black-capped Antwren (Herpsilochmus atricapillus) is a diminutive and active member of the Thamnophilidae family, characteristic of Neotropical subcanopy and mid-story layers. This small antwren measures approximately 11-12 cm in length and weighs around 8-10 grams, sporting a striking sexual dimorphism. Males are easily identified by their glossy black crown, a prominent white supercilium, and contrasting gray upperparts finely streaked with black, while females possess a rufous-tinged c...
This species primarily inhabits the mid-story and subcanopy of dry to semi-humid deciduous and gallery forests, often at elevations from near sea level up to around 1,000 meters.
Its diet consists almost entirely of small arthropods, including insects and spiders, which it gleans from foliage and bark surfaces.
The Black-capped Antwren is a highly active, diurnal bird, constantly flitting through foliage in search of prey. It is typically observed foraging alone or in pairs, but frequently joins mixed-species flocks, moving efficiently through the forest mid-story. Foraging involves rapid gleaning, reac...
The Black-capped Antwren has a disjunct distribution across South America, primarily in eastern and central Brazil, eastern Bolivia, eastern Paraguay, and northeastern Argentina. One major population resides in eastern Brazil, extending from Ceará south through Bahia to EspĂrito Santo and Minas G...
Least Concern
- The Black-capped Antwren is a member of the Thamnophilidae family, known as 'antbirds,' although many species in this family, like the antwren, do not directly follow ant swarms. - Males possess a striking jet-black cap, a characteristic that gives the species its common name and is a key ident...