Their upperparts are olive with black streaks, their breast has a buff tinge, and their belly is dull cinnamon-buff.

It is found in Colombia's Eastern Andes and their extension into northern Venezuela as far as Lara, in the Serranía del Perijá that also straddles the Colombia/Venezuela border, and in parts of the Venezuelan Coastal Range.

It especially favors bamboo thickets and occurs less frequently in other dense undergrowth such as vine tangles and shrubby forest borders.

[6] The diet of Klages's antbird is not known in detail; it is thought to feed primarily on insects and probably also on spiders.

It typically forages in pairs or in family groups and seldom joins mixed-species feeding flocks.

[6][7] The breeding season of Klages's antbird has not been defined but appears to include June.

[1] It is considered common on the Paria Peninsula in Venezuela and more local in other sections of the Coastal Range and the Andes.