These Barn Swallows come every year to nest on my front porch carriage light but, in 2014, they nested a second time above my front door unfortunately, creating a large mess! I came home from work one day to find the parents building a second nest of the season above my front door, having first laid a brood on the carriage light a few feet away babies flown away, then building this second nest, laying the eggs, young hatching, growing and leaving the nest for their first flight and on!