But due to human encroachment they have altered their nest site selection to utilize quarry slag piles. Because of the ephemeral nature of this habitat, it is important to understand the movement and ecology of this species. The Observatory has studied three coloniew of bank swallows since 1992.
Baseline data includes movement between colonies, recruitment, and longevity.
The Obsevatory also works with quarry owners in an attempt to provide some continuity in nesting habitat.