 The only visible improvement within the wilderness was the Chandeleur Lighthouse on the north end of the islands; the lighthouse was constructed before the turn of the 20th century.Breton NWR provides habitat for colonies of nesting wading birds and seabirds, as well as wintering shorebirds and waterfowl.Twenty-three species of seabirds and shorebirds frequently use the refuge, and 13 species nest on the various islands.