Leiothlypis
Leiothlypis is a genus of New World warbler, formerly classified within the genus Oreothlypis or Vermivora.
The genus was introduced by the Dutch ornithologist George Sangster in 2008 with the Tennessee warbler as the type species. The genus name is derived from the Ancient Greek λειος/leios meaning "plain" and θλυπις/thlupis, an unknown small bird mentioned by Aristotle.
Although in 2009 the genus was rejected by the American Ornithological Society's Committee on Classification and Nomenclature of North and Middle American Birds, it was accepted in their 2019 supplement to the Check-list of North American Birds.
Species
Six species are recognised:| Image | Scientific name | Common Name | Distribution |
| Leiothlypis peregrina | Tennessee warbler | southern Central America and northern South America. | |
| Leiothlypis celata | Orange-crowned warbler | southern United States and south to Central America. | |
| Leiothlypis crissalis | Colima warbler | Sierra Madre Occidental and Oriental of central Mexico, into adjacent southwestern Texas in the Chisos Mountains of Big Bend National Park. | |
| Leiothlypis luciae | Lucy's warbler | southwestern United States and northwestern Mexico. | |
| Leiothlypis ruficapilla | Nashville warbler | North and Central America | |
| Leiothlypis virginiae | Virginia's warbler | southern mountains of Colorado, central Wyoming, and central and western New Mexico. |