Stock Photo: Tundra Swan Resting In Blackwater National Wildlife Refuge On Its Migration Route.

KEYWORDS

bird animal waterbird beak waterfowl wildlife wing goose swan water nature shorebird tundra resting blackwater national refuge migration north american population whistling nwr swans nesting arctic migrating wintering areas native trumpeter southern wetlands habits feeding bill fly egg tail flock flight feather feathers chick aviary incubate nest nestling migrate rook roost rookery atlantic flyway maryland's eastern shore cambridge maryland dorchester county river tea-colored waters peat soil marshes species threatened endangered plants marshes fields winter