One of the most common and widespread warblers. Breeds in forested areas with at least some conifers. Found in open woods and shrubby areas during migration and winter, including coastal vegetation, parks, and residential areas. Forages for insects, often sallying out to snatch them in midair. Also eats berries in winter. Often travels in large flocks. Two subspecies: "Audubon's" in the West and "Myrtle" in the East. "Audubon's" has a yellow throat in all plumages. "Myrtle" has whitish throat. Most abundant wintering warbler in the U.S.