Far more frequently detected by voice than sight, White-lored Tyrannulet occurs throughout most of Amazonia and parts of coastal Brazil. Their song is a series of four or five piercing notes that accelerate slightly: pweee, pweet, weeet, weeet, weet. This species often join mixed foraging flocks as individuals or pairs, and generally stays in the canopy near forest edges. They feed by gleaning insects from foliage. Though similar in appearance to other tyrannulets, White-lored has a white supercillium and wingbars made of distinct white spots.