Smallish, dapper bird of rainforest canopy. Usually seen from below; best identified by clean white underparts, heavy bill, and upright posture. With better view, note male’s iridescent blue sheen above and female’s distinctive pattern. Moves through canopy slowly and deliberately, scanning surroundings and sallying for insects. Uncommon in tall forest; often seen with mixed-species flocks. Most common call is a series of sweet, rising whistles with the first note drawn out.