Black Antshrike

The black antshrike, Thamnophilus nigriceps, is a distinctive member of the antbird family, Thamnophilidae. This species is characterized by its robust build and stout, hooked bill reminiscent of true shrikes. It measures between 15 to 16 cm in length and weighs approximately 23 to 24 grams.

Identification Tips

Sexual dimorphism is present in this species. The adult male is predominantly black with dark gray flanks. Notably, the underwing coverts and the edges of the underside of the flight feathers are white. The adult female, on the other hand, has a blackish gray head and upper breast with buff-white streaks. Her upperparts, wings, and tail are rufous-brown, and the lower breast and belly are gray with buff-white streaks. The crissum is an unstreaked buff. Subadult males and females can be distinguished by the pale edges on their wing coverts and the broader streaks on their breast, respectively.

Habitat

The black antshrike is found in the edges and regrowing clearings of evergreen forests, secondary forests, and semi-open woodlands. It shows a particular affinity for dense thickets of vines, thorns, and Heliconia plants.

Distribution

This bird is native to Panama and Colombia, with its range extending from eastern Panamá Province through Darién Province and into northern Colombia, including the Chocó Department and the Magdalena River valley up to Tolima Department.

Behaviour

The black antshrike is a year-round resident within its range, typically foraging alone or in pairs. It is not commonly seen joining mixed-species feeding flocks.

Song & calls

The song of the black antshrike is a series of musical yet emphatic notes that slightly accelerate and maintain an even pitch. Its calls include a hollow, nasal note that may be repeated, as well as a nasal growl.

Breeding

Currently, there is no detailed information available regarding the breeding biology of the black antshrike.

Diet and Feeding

While the specific diet of the black antshrike is not fully documented, it is presumed to consist of insects and other arthropods. It forages within dense vegetation, typically close to the ground but occasionally reaching heights of up to 7 meters.

Conservation status

The IUCN has classified the black antshrike as Least Concern due to its large range and estimated population of 20,000 to 50,000 mature individuals. Although the population is believed to be decreasing, there are no immediate threats identified. The species is considered locally common in Colombia and is present in at least two national parks. However, due to its elusive nature, it may be more accurately categorized as Data-deficient.