A very small, drab bird of montane forest understory. Pale brown underparts, dark brown upperparts, Gray from the crown to upper back widening to a half-collar. Distinct buff face forming a disk around the eye. Found in active groups or mixed flocks, where it gleans leaves for insects. Similar to Large Scrubwren but Buff-faced is often found higher in the trees, is smaller with a buff eye-ring and gray crown. Song, an up-and-down, whistled “poo-pii-poo-pii-poo-pii!” and call, a nasal “rek!”.