Their territory is typically between 300 and 750 meters above sea level (ASL), but on rare occasions, it can reach 1,500 meters. These birds can be found on the forest floor and in the understory. And it is more common in areas with a lot of herbaceous undergrowth, such as the slopes next to streams, deep, damp ravines in the foothills, and other such locations.
The diet of the dull-mantled antbird is composed of insects and other arthropods.