The Stewart B. McKinney National Wildlife Refuge is a 950-acre (384.5 ha) National Wildlife Refuge in ten units across the U.S. state of Connecticut. Located in the Atlantic Flyway, the refuge spans 70 miles (110 km) of Connecticut coastline and provides important resting, feeding, and nesting habitat for many species of wading birds, shorebirds, songbirds and terns, including the endangered roseate tern. Adjacent waters serve as wintering habitat for brant, scoters, American black duck, and other waterfowl.