Small vireo-like bird found in variety of lightly wooded habitats from forest edges and scrub to gardens where it can be quite common; often accompanies mixed-species flocks. It has a distinctive gray head and is olive-green above with a yellow breast and an off-white belly. The song is a fast and prolonged trill, “pweeeer-pweeer-pweeer-prrre-e-e-e-e.”