Reiser's Tyrannulet Phyllomyias reiseri

Small, yellow-green flycatcher. Note the white lores and gray crown. An apparently rare and poorly-known inhabitant of gallery forests and tall savanna dry forests. May accompany mixed-species flocks. The song is a harsh series of notes: “briu-briu-briu-briu-briu-briu-briu.” Separated from the similar Greenish Tyrannulet, with which it commonly co-occurs, by smaller size, grayer crown, and yellow ear-coverts.