463. Empidonax flaviventris. 5 1/2 inches.

These strange little Flycatchers are found in swamps such as those usually frequented by Olive-sided Flycatchers and Parula Warblers. They are one of the few of the family to nest on the ground or very close to it. Their homes are made in the moss-covered mounds or stumps found in these swamps.

Range. - N. A. east of the Plains north to Labrador, breeding from northern U. S. northward.