A Yellow-bellied Flycatcher (Empidonax flaviventris) sits in a tree and calls incessantly in Carara Biological Preserve (Costa Rica), 11/17/98 - these are 2 examples of different individuals only minutes apart.
Hammond's Flycatcher (Empidonax hammondii) visits Tavasci Marsh [Arizona] regularly. This is an example of his notes, which is sung while awaiting the next meal.
The Southwestern Willow Flycatcher (Empidonax traillii extimus) is an endangered "Empid" that breeds in the riparian Willow/Cottonwood/Salt Cedar thickets. This pair was recorded along the Verde River near Camp Verde in central Arizona on 5/30/98. If you hear this easily distinguished "Fitz-bew" song, please let me know. This bird is a victim of Cowbird parasitism and habitat reduction and is on its last legs!