Outer Brewster Island, also known as Outward Island, is one of the outer islands in the Boston Harbor Islands National Recreation Area and is situated some 10 miles offshore of downtown Boston. The island has a permanent size of 20 acres, and consists of exposed bedrock covered by fertile soil bounded by a rocky shore with steep cliffs. It provides a nesting habitat for coastal water birds, including Cormorants, Gulls, Common Eider Ducks, Glossy Ibis and American Oystercatchers.