Name (Latin): Tachycineta bicolor
Size: Small Songbird
Description:An aerial forager, 4.5-6 inches in length. Wingspan up to 14 inches. White underparts with brown back/ greenish sheen. Sometimes a light brown chestband.
Song/Sounds: Listen Here
Habitat: Marshes and open fields.
Seasons in Keene: Summer breeding season from late March to August.
Nest and Eggs: The Tree Swallow uses many feathers from other birds in its nest. The feathers help keep the nestlings warm so they can grow faster.
Similar Species: Other Swallows, particularly barn swallow, which is more associated with human built structures.
Distribution: 
Population: Not of concern for conservation efforts in this area.
Trends:
Threats:Development along migration routes, habitat loss in both breeding and wintering areas.
Fun Facts: Forms large flocks and night roosts in winter range. Nightly return to roost compared to a "living tornado."
Video: See here