The palm warbler (Setophaga palmarum) is a small songbird of the New World warbler family. Palm warbler nests take the form of an open cup, usually situated on or near the ground in an open area. 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.org, CC BY-SA)