Bank Swallows range around the northern hemispheres of world. In North America, they often breed in river banks and cliff sides. I have often found them nesting in construction sand mounds. Sand and gravel quarries often provide nesting areas. The problem with these latter sites is that they tend to be transitory. Dirt piles left by builders, for example, often remain, at best, for a few years. The result is that Bank Swallows do not show much “nest-site fidelity.” Long-term ties to specific colony sites are not to the swallow’s advantage (Garrison 1990).