The Tree Swallow (Tachycineta bicolor) is a bird of open fields and marshes and will take to housing readily. For many years we kept a nestbox trail for both Tree Swallows and Eastern Bluebirds, and they never failed to entertain and delight us with their behaviors and airial acrobats. Tree Swallows are highly social and a very approachable bird, and are true masters of flight. They sail, soar, hover and turn on a dime while hawking insects. I discovered long ago that if I hold small white craft feathers in my outstretched palm, these swift fliers will often swoop down to my hand to snatch them up, as they use them for to line their nests. The males are highly territorial during the early weeks of nesting season and disputes are common, yet brief.
These are but a very few of the hundreds of images I've taken over the years at a nestbox trail near our present home. They were not baited nor called in, as the nestboxes themselves were their main focus and they rarely paid any attention to me whatsoever. (I've used a graphics program to render the photos in a painterly fashion.)