Small flycatcher most often seen high in rainforest canopy, often with mixed species flocks. Its bill is very wide at the base and wing feathers are conspicuously edged with yellow. Confusingly similar to several other species. Dark eye helps to separate it from Gray-crowned Flycatcher, and usually shows brighter wings with less well defined wingbars than Yellow-olive Flycatcher. Whitish (not yellow) throat distinguishes it from Olive-faced Flycatcher and Ochre-lored Flycatcher. Voice is often the best clue. Yellow-margined Flycatcher gives a rising series of clear or buzzy whistles. Song has a very nasal quality in some parts of its range. Birds found west and north of the Andes are now considered a separate species, Yellow-winged Flycatcher.