Tree Swallow — Tachycineta bicolor
This swallow is steely bluegreen above and white below. The immature has a dusky brown back and can be confused with a Roughwinged Swallow or a Bank Swallow. These swallows glide in circles and are often seen flying over lakes, rivers, meadows, marshes or ponds. The swallows frequently nest in these same areas, but also can be seen nesting in boxes on farms and residential areas. This bird ranges from Canada south to Virginia during nesting season and winters from Florida south to Central America.