Serra do Mar Bristle-Tyrant Pogonotriccus difficilis

Tiny flycatcher with a long slender tail. Differs from other tyrannulets in being mostly bright olive-green above and gray below with darkish ear patches, prominent white eyerings, and pinkish (not dark) legs. Found in the understory of dense humid montane forests between 950–2,150 m; rarely joins mixed-species flocks. The song is a series of loud harsh notes; also makes snapping noises with its bill.