The streak-backed antshrike (Thamnophilus insignis) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds".

Their forehead has faint white spots, their rear crown is dark red-brown, and their underparts are somewhat paler than the male's.

It favors areas of stunted trees with a dense understorey dominated by Melastoma and Clusia vegetation and also occurs in bamboo thickets and Brocchinia scrub.

[6] The species' calls include a variable-length "somewhat downslurred raspy growl" and a "soft squeak or ' peep' ".

[1] It is considered uncommon to locally common in its somewhat restricted range, which includes several protect areas.

"Owing to the largely inaccessible nature of the region, the tepuis have been little affected by human disturbance, and upper-elevation floras and faunas remain relatively pristine.

Nevertheless, these ecosystems are considered highly sensitive to disturbance, and threats from uncontrolled burning and gold-mining do exist.