The Tennessee WarblerOreothlypis peregrina, is a New World warbler that breeds in eastern North America and winters in southern Central America and northern South America.
The breeding male has olive back, shoulders, rump and vent. The flight feathers are brownish-black. It has a slate gray neck, crown and eyeline. The underside is a gray-white. The female is similar to the male, but is much duller and has a greener tinge to the underside. The Tennessee Warbler has long wings, short tail and a thin, pointy bill.
This bird can be confused with the Red-eyed Vireo, which is larger, moves more deliberately and sings almost constantly.
This warbler, like most others, is nervous and quick while foraging. It creeps along branches and is found at all levels. It is solitary while nesting, but forms mixed flocks after breeding.
The Tennessee Warbler prefers coniferous forests, mixed conifer-deciduous forests, early successional woodlands and boreal bogs.