The barn swallow is a small bird known for its distinctive forked tail and sleek, blue-black feathers. It typically measures about 6 to 7 inches in length and has a white underbelly. These birds are commonly found in North America, Europe, and Asia, often nesting in barns, bridges, and other man-made structures. Barn swallows are skilled fliers, catching insects mid-air as their primary food source. They are social birds, often seen in groups, and are known for their graceful flight patterns. Their presence is a sign of warm weather, as they migrate south during the colder months to regions like Central America.