Fairly small tanager-like sparrow with an extremely tiny range in Panama. Occurs in humid forests from around 800–1,500 m. Olive-brownish overall with brighter yellow-ochre underparts and grayish belly. Note pale eyes. Very similar to Pirre Chlorospingus but apparently little or no range overlap; Tacarcuna has grayer belly and less contrasting dark face than Pirre Cholorspingus. Like other chlorospingus, typically found in small groups, often with a mixed-species flock. Usually sticks to the understory or middle levels.