Scientific name: Oporornis formosus
The Kentucky Warbler is a ground-nesting warbler of moist, eastern forests. Its loud, rich song is similar to that of the Carolina Wren. Kentucky Warblers have declined, and it is thought to be due to tropical deforestation.
Kentucky Warblers maintain territories in winter as well as summer, and they tend to return to the same territories each year on both their breeding and wintering grounds. Nests are commonly parasitized by Brown-headed Cowbirds, though the warblers sometimes lay extra eggs when that happens.