The Plumbeous-backed Thrush has a blue-gray back and tail. It occurs in Ecuador and extreme northwestern Peru; in Peru, it is recorded in semideciduous forest up to 1,500 meters.
Its upperparts and tail are blue-gray, with a white iris and yellowish bill. The underparts are creamy white, and the throat has black streaks.
It forages in the canopy and subcanopy of semideciduous forest. The habitat and elevation details up to 1,500 meters refer to northwestern Peru, separately from the Ecuador range listing.
An extinction-risk assessment has not been added yet.