Sweetwater Marsh NWR, Imperial Beach, California: This bit of salt-marsh habitat, just 315 acres, is all that's left of the huge salt marshes surrounding San Diego Bay. The refuge was developed as a result of a court-ordered settlement over a...
Tensas River NWR, Tallulah, Louisiana: The remnant bottomland-hardwood forest that makes up the terrestrial portion of Tensas River Refuge is home to the equally rare Louisiana black bear and Bachman's warblers. The aquatic portion comprises oxbow...