All in all, I get along with my barn swallow neighbors, and they are beautiful to watch in flight while they pick off dragonflies and the like. Currently, these birds are particularly abundant because recently fledged young are maneuvering their way around old farmsteads in ways only a barn swallow can. The pair under my deck already fledged four young, and the second brood is now hatched and getting ready to fledge. This species needs man-made structures to nest, or will otherwise nest on cliffs and ledges. Thus, the barn swallow exists in a secure state and is nearly worldwide in distribution.
In fact, recent observations have confirmed that barn swallows, in an unlikely move, have started nesting on overwintering grounds. Traditionally, their breeding range has included most of the northern latitudes while wintering grounds included most of the southern hemisphere. In another twist, during winter, these breeding Argentinian barn swallows migrate north for winter. The exact reason for this shift is unknown, but the barn swallow, already a bird happy with human innovations, has turned its own innovation by completely changing its migratory patterns.