Rondonia Warbling-Antbird Hypocnemis ochrogyna

A relatively small antbird. Males are heavily streaked black and white on the head and back with a lightly streaked breast, and rusty flanks and lower back. Females have a browner tinge to the head and back. Inhabits the understory of humid primary forest and old second growth, favoring tree fall gaps. Sometimes accompanies mixed-species flocks and regularly attends army-ant swarms. The song begins with a clear series of 4-6 notes and finishes with harsh notes.