Learn how to identify a male and female tree swallow. Find out about their nests, song, range map and what tree swallows eat.

The tree swallow is larger, entirely greenish blue ... Winter: tidal flats to interior mountains. A few birds in southern California, but most from Mexico south to Guatemala, El Salvador, and ...

Swallows live for up to 11 years and start breeding at 2 years of age. They are excellent fliers but often land in large groups on telephone poles etc. At the end of a day, they will fly in ever ...