Thamnophilus divisorius
The Acre Antshrike, *Thamnophilus divisorius*, is a relatively recently described bird species, formally identified in 2004. This medium-sized antshrike measures approximately 16.5-17 cm in length and weighs between 24-28 grams. It exhibits strong sexual dimorphism; males are almost entirely glossy black with a concealed white dorsal patch and a few white spots or barring on the wing coverts. Females, by contrast, sport a rich rufous-chestnut plumage, which darkens slightly on the wings and t...
Primarily inhabits the dense understory of humid tropical lowland evergreen forests, favoring terra firme forests and often found near forest edges or clearings with tangled vegetation and vine-covered trees, typically below 300 meters elevation.
Primarily insectivorous, feeding on a variety of arthropods gleaned from leaves, branches, and bark within its forest habitat. Occasionally supplements its diet with other small invertebrates.
This diurnal species typically forages alone or in pairs, preferring the lower to mid-story vegetation where it methodically gleans arthropods from foliage, branches, and vine tangles. Unlike some other antbirds, it rarely joins mixed-species flocks. Males are notably vocal, frequently emitting l...
The Acre Antshrike exhibits a highly restricted and somewhat disjunct distribution within the southwestern Amazon basin of South America. Its primary known range is concentrated in the state of Acre, Brazil, extending into adjacent parts of southeastern Peru, particularly the Madre de Dios region...
Least Concern
- Discovered and formally described as recently as 2004, making it one of the newest avian species known to science. - Its scientific name, *divisorius*, refers to its suspected status as a relict population, geographically 'divided' from other *Thamnophilus* species. - The male's almost entirely...