Black-crowned Antshrike Thamnophilus atrinucha

  • Order: Passeriformes
  • Family: Thamnophilidae
  • Polytypic: 2 subspecies
  • Authors: Corey E. Tarwater and J. Patrick Kelley
Sections

Conservation

Conservation Status

The IUCN conservation status of the Western Slaty-Antshrike is Least Concern. This species is widely distributed, is relatively common, and population trends appear to be stable.

Effects of human activity on populations

None reported. The major threat to this species is habitat loss. This species appears resilient, maintaining populations in forests where other understory insectivores have declined or gone extinct (for example, Barro Colorado Island, Robinson 1999). Nevertheless, in a study comparing abundance and composition of birds in forest fragments versus cacao plantations, although one of the most abundant species in the nearby forest fragments, no Western Slaty-Antshrikes were observed in cacao (Van Bael et al. 2007). They are also less abundant in scrubby, younger forest compared to older forest interior habitat (Cody 2000, Libsch 2005). Understory insectivores and species residing in mixed species flocks are more often the birds that go extinct from forest fragments (Sigel et al. 2006), and Western Slaty-Antshrikes are both. Furthermore, the reluctance of many forest-interior birds to cross non-forest matrix (Sekercioglu et al. 2002), including Western Slaty-Antshrikes (Moore et al. 2008), may increase their vulnerability to habitat loss. Their small territories may result in it taking longer to observe population declines compared to other species. More research on Western Slaty-Antshrikes in fragmented and degraded habitat would prove useful.

Recommended Citation

Tarwater, C. E. and J. P. Kelley (2010). Black-crowned Antshrike (Thamnophilus atrinucha), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/nb.wesant1.01