There have been recent posting about poor success in swallow boxes. My experience has been the opposite. I look after 88 nest boxes on Green Island, a project of the McKenzie River Trust, located along the Willamette River about two miles north of Coburg. It is a large restoration project of historical farmland now turned to trees, shrubs, and open fields. It is a rich habitat for Tree Swallows. Every one of the 88 nest boxes has been used this spring. Three of the 88 nests failed and the remainder were successful (three still have young and 85 have fledged young). Five of the boxes were used by Western Bluebirds and 83 of the boxes were used by Tree Swallows. Nearly 80 percent of the boxes now have a second brood of Tree Swallows, most with four or five eggs in them.
I am interested in hearing what it is like for other nest box projects.