 The tyrant flycatcher family, the Tyrannidae, is a group of passerine birds present only in the New World, and its members are generally drab in coloration.Within it, the subfamily Fluvicolinae comprises the genera "Pyrocephalus", "Contopus", "Empidonax", and "Sayornis".They likely shared a common ancestor in the "Contopus" or "Xenotriccus" genus before diversifying.