Back Bay National Wildlife Refuge is located in Virginia and was established in 1938 to provide habitat for migrating and wintering waterfowl. The refuge contains more than 8,500 acres, situated around Back Bay, in the southeastern corner of the City of Virginia Beach. Because of its unique geographic location along the Atlantic Coast that provides overlapping ranges for both northern and southern species, biodiversity is high. Habitats include barrier island beach and dunes, shrub-scrub, woodlands, farm land and fresh and brackish marsh. Since 1939, an additional 4,600 acres of Bay waters within the refuge boundary have been closed to migratory bird hunting by Presidential Proclamation. Today the Refuge continues to be an important link in the chain of National Wildlife Refuges along the Atlantic Flyway. More than 300 species of birds have been observed at the Refuge. During the fall and winter months, large flocks of waterfowl use the Bay and freshwater impoundments. The Snow and Canada goose, Tundra swan, and many duck species are abundant. Migrating songbirds and shorebirds arrive at the Refuge each spring and fall. Brightly colored warblers dot shrub and woodland areas while shorebirds search for food in shallow waters. Habitats are also used by a wide assortment of other wildlife, including such threatened and endangered species as the Loggerhead sea turtle, Piping plover, Peregrine falcon, and Bald eagle.