Palm warblers breed in open coniferous bogs and edge east of the Continental Divide, across Canada and the northeastern United States. These birds migrate to the southeastern United States, the Yucatán Peninsula, islands of the Caribbean, and eastern Nicaragua south to Panama to winter

Palm warblers forage on the ground much more than other warblers, sometimes flying to catch insects. These birds mainly eat insects and berries. Their constant tail bobbing is an identifying characteristic. Kirtland's, prairie, and palm warblers are the only Setophaga species that incessantly bob their tails. The song of this bird is a monotonous buzzy trill. The call is a sharp chek.

source: Wikipedia.com