How far apart should Tree Swallow nest boxes be spaced?
Tree Swallows are more territorial than many other swallow species. Swallow boxes should be 100 feet apart, or more. It’s true Tree Swallows will sometimes nest closer, but squabbling between crowded pairs can interfere with care of eggs and young. Measure your stride so you can use number of steps to determine proper distance between boxes in the field. Arranging boxes in a grid or loop makes it convenient for box checks.
