The Pine Warbler (Dendroica pinus) is one of the few species of warblers that can be seen in the southern United States in the winter. It is the earliest breeding warbler and can flock up in large groups of 50-100.
The Pine Warbler is the only warbler that eats large quantities of seeds, primarily those of pines. This seed-eating ability often brings them to bird feeders where they eat seeds in addition to suet. – Cornell Lab of Ornithology