The overall goal of this project is to conserve Least Tern populations that breed in the northeastern U.S. Currently we know very little about where this species occurs during migration or on the wintering grounds. By specifically linking breeding colonies with known wintering and migratory stopover sites we will be able to assess the full range of threats faced by the species during the course of the year, rather than solely focus on the goal of preventing human disturbance of nesting areas.