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Thamnophilus divisorius

Acre Antshrike

  • Order: Passeriformes
  • Family: Thamnophilidae
  • Monotypic

Authors: Schulenberg, Thomas S., and Guy M. Kirwan

Thamnophilus divisorius

Divisor camp, Sierra del Divisor, Loreto, Peru, 15 August 2005 © Guillermo Knell

The recently described Acre Antshrike was discovered very recently within the Parque Nacional da Serra do Divisor, in Acre, at the extreme southwest frontier of Brazil, specifically on the Serra da Jaquirana, the easternmost of a series of narrow ridges in the Serra do Divisor. The species was encountered again a few years later on physiognomically similar ridges in the neighboring department of Ucayali, in Peru. Within its range, the Acre Antshrike is common but is restricted to stunted ridgetop woodlands with a broken canopy and dense understory on very thin soils. Males are very dark bluish gray, becoming progressively blacker over the head, wings, and tail, while females are bluish gray above, and brownish orange below, and the birds remain in close-knit pairs, which forage apart from mixed-species flocks.

Recommended Citation

Schulenberg, Thomas S., and Guy M. Kirwan. 2011. Acre Antshrike (Thamnophilus divisorius), Neotropical Birds Online (T. S. Schulenberg, Editor). Ithaca: Cornell Lab of Ornithology; retrieved from Neotropical Birds Online:

This map provided by Robert S. Ridgely.

  • Migration/Movement:Resident (nonmigratory)
  • Primary Habitat:White sand forest
  • Foraging Strata:Understory/Midstory
  • Foraging Behavior:Glean
  • Diet:Terrestrial invertebrates
  • Sociality:Solitary/Pairs
  • Mating System:
  • Nest Form:
  • Clutch: -
  • IUCN Status:Least Concern