The Nashville warbler (Oreothlypis ruficapilla) is a small songbird in the New World warbler family, found in North and Central America. It breeds in parts of the northern and western United States and southern Canada, and migrates to winter in southern California and Texas, Mexico, and the north of Central America. It has a gray head and a green back, and its underparts are yellow and white.
Nashville warblers breed in two distinct areas, one in Canada and the northeastern United States, and another in the western United States. The northeastern part of its range extends from Côte-Nord and Cape Breton Island in eastern Canada to central Alberta. For the most part, it only breeds between about 52 and 45.5 degrees north, but it is also found less commonly in the Appalachians of Pennsylvania and West Virginia. Although named after Nashville, Tennessee, the Nashville warbler only visits that area during migration. They migrate to southernmost Texas and California, mid-Mexico, and the northernmost parts of Central America (Guatemala and El Salvador) in winter. In their breeding range, they prefer open mixed woods and bog habitats. source