The family Peucedramidae includes 1 species found in North America.
This is a family that contains only one species -- the Olive Warbler. It is found in montane conifer forests.. The relationships of the Olive Warbler have been uncertain because its hyoid apparatus (muscles controlling the tongue) is typical of wood-warblers. While it looks like a wood-warbler, it differs in many ways. Some have thought that it is a sylviid.
Olive Warbler- Patuxent Bird ID Center