Stock Photo: Mating Pair Of Tundra Swans Gliding Along The Marsh Water In Blackwater Nwr.

KEYWORDS

bird animal waterbird ducks duck waterfowl beak wildlife mallard goose wing swan shorebird nature seabird poultry mating pair mute swans gliding marsh blackwater nwr national refuge tundra american whistling nesting arctic migrating wintering native trumpeter wetlands food shifting habits feeding sanctuary birds atlantic flyway eastern shore cambridge maryland dorchester freshwater brackish tidal united states fish tea-colored waters marshes threatened endangered plants mammals winter migration marshland low-lying flooded wet seasons tide waterlogged coastline coast grass tract grasses cattails bog fen marshland slough