[3] The Imeri warbling antbird was described by the English zoologist Philip Sclater in 1865 and given the binomial name Hypocnemis flavescens.

[3][5][6] The Imeri warbling antbird has two subspecies, the nominate H. f. flavescens (Sclater, PL, 1865) and H. f. perflava (Pinto, 1966).

Their flight feathers are brown with yellowish olive-brown edges and their wing coverts black with white tips.

Their breast and sides have sparse dark streaks and their belly, flanks, and undertail coverts are deep rufous.

[7][8][9][10] The nominate subspecies of the Imeri warbling antbird is found in southern Venezuela's Bolívar and Amazonas states, in Colombia from eastern Caquetá Department east through Vaupés and Guainía departments, and in extreme northwestern Brazil in the upper basin of the Rio Negro.

[7] The Imeri warbling antbird's diet and foraging behavior are not known in detail, but it feeds primarily on insects and spiders.

It forages mostly in dense vegetation such as vine tangles, understorey shrubs, bamboo thickets, and among epiphyte cluster on tree trunks and branches.