Medium-sized, active flycatcher of forest canopy; often observed on the periphery of mixed-species flocks. When seen well, note entirely yellow underparts, including throat. Found in a variety of lowland forest types, including tall rainforest and low-stature forests on sandy soils. Forages actively, almost always in small groups; often sits on top of large leaf clusters on outer branches. Similar to several other kiskadee-like flycatchers, but behavior and voice are quite different. Quite vocal; often-heard call is a distinctive hollow rattle with a purring quality.