Annual Survey Estimates Number of Wintering Duck, Geese, and Swans In early January, aerial survey teams of pilots and biologists from the Maryland Department of Natural Resources made visual estimates of the ducks, geese, and swans along most of the state’s Chesapeake Bay, Potomac River, and Atlantic coast shorelines. This year, the teams counted about … Continue reading Midwinter Waterfowl Survey Shows Rise in Bird Count