Over 15,000 tundra swans have gathered near pool 9 on the Upper Mississippi River . It is one of several stops on their migration to Chesapeake Bay. One can also view thousands of ducks including canvas backs, mallards, pintail and eagles. Pictured below is a tundra swan stretching his wings among a resting flock of ducks. For more information on the migration visit http://www.fws.gov/midwest/UpperMississippiRiver/