Tiny bird of forest canopy; difficult to see well and heard far more than seen. Appears mostly yellow from below. In addition to tiny size, note limited black streaking on breast and large bill. Found in tall lowland forest and occurs mostly in pairs that do not typically join mixed-species flocks; seems more common near rivers but is also likely to be found away from them. Sits still and darts out to snatch insects from foliage. Call is an incisive, doubled metallic note; also indistinct ticking.