Серошапочный виреончик Pachysylvia muscicapina

Small, sprightly bird of mixed-species flocks in the rainforest canopy. Note plain appearance with unmarked olive-green wings and back that contrast with buffy face and chest. Forages in leaf clusters at the ends of high branches, often hanging upside-down. Unlikely to be seen in forest understory or away from flocks. Delivers short, snappy song over and over while foraging.