Rondonia Warbling Antbird

Overview

The Rondonia warbling antbird, Hypocnemis ochrogyna, is a Vulnerable species of bird in the family Thamnophilidae. It is found in parts of Bolivia and Brazil and is considered a year-round resident throughout its range.

Identification

• Size and Weight: 11 to 12 cm long and weighs 11 to 15 g.
• Male Plumage: Black crown with a white central streak and white supercilium on a black and white speckled face; olive-gray upperparts with a speckled white patch between the scapulars; rufous rump and flanks.
• Female Plumage: Similar pattern to males but with different colours; crown streaked with pale buff, back lightly streaked pale ochraceous-brown, and smaller or absent interscapular patch.
• Song: Male's even-paced song starts with a long note followed by four to six shorter clear notes; female's song starts with a long note and ends in an abrupt note.

Habitat

The range extends from the rio Madeira to rio Roosevelt in the western Brazilian states of Rondônia and Mato Grosso, and the eastern Bolivian departments of Beni and Santa Cruz. It primarily inhabits terra firme evergreen forest, várzea, adjacent mature secondary woodland, and the ecotone between forest and savannah, mostly occurring in dense understorey vegetation at forest edges and gaps. In elevation, it ranges as high as 1,300 m.

Did you know?

The species' estimated population of 500,000 to one million mature individuals is decreasing at a significant rate, with an estimated 60% of its habitat within its range lost in the last 40 years due to forest clearance for agriculture and cattle ranching.