About
The Tree Swallow is able to winter far north of its relatives primarily due to its ability to supplement its diet of insects with seeds and berries. In the Mid-Atlantic, a staple of its winter diet is bayberry and Wax Myrtle fruit. The same dietary supplement also fuels the hordes of Yellow-rumped "Myrtle" Warblers that winter on Assateague Island, far north of other insect-eating warblers.Synonyms
- TRES