Whitestarts are New World warblers in the genus Myioborus. The English name refers to the white outer tail feathers which are a prominent feature of the members of this genus. The species in this genus are also often called "redstarts".

The New World warblers or wood-warblers are a group of small, often colorful, passerine birds that make up the family Parulidae and are restricted to the New World. The family contains 120 species. They are not closely related to Old World warblers or Australian warblers. Most are arboreal, but some, like the ovenbird and the two waterthrushes, are primarily terrestrial. Most members of this family are insectivores.