Hormiguero Ventrigrís

Identificación

The grey-bellied antbird is 12.5 to 14 cm (4.9 to 5.5 in) long and weighs 17 to 18.5 g (0.60 to 0.65 oz). Adult males have a mottled whitish and gray face. Their crown is dark grayish brown and their back and rump are yellowish red-brown. Their wings and tail are dark reddish brown and their wing coverts blackish with large pale buff tips. Their throat and breast are black with a gray border that becomes reddish yellow-brown on the rest of the underparts. Adult females have upperparts like the male's but with larger white spots on the wing coverts. Their throat, breast, and belly are mostly white with a blackish scaly appearance on the upper breast. Both sexes have a black bill and pale brown legs.

Taxonomía

The grey-bellied antbird was originally described by the English zoologist Philip Sclater in 1890 and given the binomial name Myrmeciza pelzelni. A molecular phylogenetic study published in 2013 found that the genus Myrmeciza was polyphyletic. In the resulting rearrangement to create monophyletic genera the grey-bellied antbird was moved to its own genus Ammonastes. The name of the genus combines the Ancient Greek words ammos "sand" and nastes "inhabitant" as the grey-bellied antbird occurs in vegetation growing on sandy soil. The specific epithet honors the Austrian ornithologist August von Pelzeln (1825–1891).<p>The grey-bellied antbird is monotypic.

Nombre científico

Ammonastes pelzelni

Autoridad

(Sclater, PL, 1890)

Orden

Passeriformes

Familia

Thamnophilidae

Género

Ammonastes

Distribución y hábitat

The grey-bellied antbird has a disjunct distribution. It is found in Colombia in the south-central Caquetá Department and the far eastern Guainía and Vaupés departments. In Venezuela it occurs in southwestern Amazonas state, and in Brazil in extreme northwestern Amazonas state along the upper reaches of the Rio Negro. It primarily inhabits Amazonian caatinga forest growing on white-sand soils, a biome characterized by tall trees and a sparse understorey. It also occurs in denser forest with concentrations of bromeliads on white sand and in the ecotone between the caatinga and igapó (seasonally flooded) forest. In elevation it is found only as high as 400 m (1,300 ft) above sea level.

Migración

Especie residente

Comportamiento

Patrón migratorio: Especie residente.

Conservación

Tendencia poblacional: estable.

Tendencia poblacional

estable