White-bearded antshrike

The white-bearded antshrike (Biatas nigropectus) is a Vulnerable species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to Argentina and Brazil.

The white-bearded antshrike is 17 to 18 cm (6.7 to 7.1 in) long. This species exhibits some sexual dimorphism, and both sexes have a crest. Adult males have a black forehead, crown, and upper nape. The black of the crown extends down to the lores and eyes except for a faint white line through the eye. Their chin and the rest of their face are white that becomes pale buff around the lower nape. Their upperparts are reddish yellow-brown and their wings and tail are rufous. Their lower throat and breast are black and the rest of their underparts clay-colored. Females have a rufous-brown crown, a distinct white supercilium, and no black on the throat and breast. Their back, wings, tail, and lower underparts are like the male's.