Want to attract purple martins – those aerial acrobats who snap up flying insects? Start by placing a purple martin house in your yard. These large swallows feed and roost in flocks. In the eastern United States, purple martins often nest in purple martin houses and nest boxes. In the West, purple martins are attracted to old woodpecker holes for nesting. When placing nest boxes in your yard, remember that purple martins are attracted to feeding areas that are open and near water. To attract purple martins, you can also place crushed eggshells in your yard so martins have grit for digestion. Purple martins are migratory and, at the end of breeding season, gather in flocks and fly to South America.