A pair of Barn Swallows was building a mud and straw nest high up on a rafter in the eave of a log outbuilding at the Wildlife Station Visitor Center in Custer State Park. When there’s no barn, they’ve got to nest somewhere. I suppose one rafter is as good as another, especially in the mind of a Barn Swallow. The colorful male perched, on a huge nail protruding from a log near the nest, waits for his mate.