Learn to identify the waterfowl that winter on the Potomac River and in the swamps and marshes of Caledon. The introduction to waterfowl identification will be followed by a visit to the waterfront to observe and identify these magnificent wintering wonders. Ducks, geese, swans and mergansers, loons and grebes sightings are possible. $3/person or $8/family. Call 540-663-3861 for more information and to make your reservations. Paid reservations are required as space is limited. Parking Fee is $5.