[3][4][5] It had earlier been treated as a subspecies of the Guianan gnatcatcher (Polioptila guianensis), and BirdLife International (BLI) retains it there as of December 2020.

The throat, breast, upper belly, and flanks are also plumbeous gray, palest near the bill.

"So far as is known, Inambari Gnatcatcher inhabits the canopy of tall, humid, upland sandy-soil forest" at less than 500 m (1,600 ft) of elevation.

"[7] The Inambari gnatcatcher's loudsong is "an evenly paced series of six notes at a nearly level frequency" [1].

"The recent advancement of soybean plantations and general infrastructure along the BR-319 highway linking Manaus to Porto Velho in Brazil, which bisects the known range of Inambari Gnatcatcher, is a clear threat to this species.