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The Mark Twain National Wildlife Refuge Complex was established for the protection of migratory birds including waterfowl, shorebirds, and songbirds. It is located along the Mississippi Flyway, one of the major routes for migrating waterfowl. Refuge units also provide important habitat for big-river fish and a variety of other native wildlife such as deer, fox, beaver, frogs, turtles, and snakes. Key goals are to conserve and enhance the quality and diversity of fish and wildlife and their habitats, to restore floodplain functions in the river corridor, and to provide wildlife-related recreational experiences for the public.
Several units within the Complex were established in the 1940s following construction of the lock and dam system. Those units were consolidated into Mark Twain National Wildlife Refuge in 1958. Since then, other areas have been added to Mark Twain, which now includes 45,000 acres (180 km2) scattered along 345 miles (555 km) of the Mississippi River and short distances up the Illinois and Iowa rivers.
In 2000, Mark Twain National Wildlife Refuge was split into five separate National Wildlife Refuges - Port Louisa National Wildlife Refuge, Great River National Wildlife Refuge, Clarence Cannon National Wildlife Refuge, Two Rivers National Wildlife Refuge, and Middle Mississippi River National Wildlife Refuge. The Refuge Complex administration office, located in Quincy, Illinois, has retained the Mark Twain name.
The United States Fish and Wildlife Service is an agency of the Department of the Interior.
40°0′N91°20′W / 40.000°N 91.333°W
Browns Park National Wildlife Refuge is a 13,450-acre (5,440 ha) U.S. National Wildlife Refuge located in northwestern Colorado. It is located in Moffat County in the extreme northwestern corner of the state, in an isolated mountain valley of Browns Park on both sides of the Green River, approximately 25 miles (40 km) below Flaming Gorge Dam. Established in 1965, the refuge is managed by the United States Fish and Wildlife Service office in Maybell, Colorado. The refuge is approximately 53 miles (85 km) northwest of Maybell on State Highway 318. The refuge consists of bottomland and adjacent benchland. The western border of the refuge is the Colorado-Utah state line. The refuge is surrounded by adjacent lines of the Bureau of Land Management. The refuge contains the site of the former Fort Davy Crockett that was constructed in 1837 to protect trappers against attacks by Blackfoot Native Americans.
Ridgefield National Wildlife Refuge is a National Wildlife Refuge and is overseen by the United States Fish and Wildlife Service. The refuge borders the Columbia River and is located west of the city of Ridgefield, Washington. The wildlife haven is split by Lake River. The refuge, which provides a year-round habitat and a migration stop for a variety of bird species, protects more than 5,200 acres (2,100 ha) of marshes, grasslands, and woodlands
William L. Finley National Wildlife Refuge is a natural area in the Willamette Valley in Oregon, United States. It was created to provide wintering habitat for dusky Canada geese. Unlike other Canada geese, dusky Canada geese have limited summer and winter ranges. They nest on Alaska's Copper River Delta and winter almost exclusively in the Willamette Valley. Habitat loss, predation, and hunting have caused a decrease in population.
The Yazoo National Wildlife Refuge is a 12,941 acre (52.4 km2) National Wildlife Refuge located in Washington County, Mississippi. Named after the Yazoo tribe, it was established to provide waterfowl and other migratory birds in the Mississippi Flyway with nesting, feeding, brooding, and resting habitat.
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. Overall, the refuge encompasses over 900 acres (364.2 ha) of barrier beach, intertidal wetland and fragile island habitats.
Port Louisa National Wildlife Refuge is a 10,780-acre (43.6 km2) National Wildlife Refuge located on the Mississippi River at the border of Illinois and Iowa. The refuge is east of Wapello, in Louisa County, Iowa and Mercer County, Illinois.
Bayou Cocodrie National Wildlife Refuge was established in 1992 to protect some of the last remaining, least-disturbed bottomland hardwood forest tracts in the Lower Mississippi Valley. These wooded wetlands, oxbow lakes, brakes, sloughs, and bayous, are inhabited seasonally by over 150 species of migratory birds, including forest-breeding birds, water birds, and waterfowl. The 15,155-acre (61.33 km2) refuge is located in Concordia Parish, Louisiana, 10 miles (16 km) southwest of Vidalia, Louisiana. It is named for the state-designated scenic river which runs through its center.
Catahoula National Wildlife Refuge, located in east central Louisiana, United States, 12 miles (19 km) east of Jena, was established in 1958 as a wintering area for migratory waterfowl. The refuge contains 25,162 acres (101.83 km2) divided into two units. The 6,671-acre (27 km2) Headquarters Unit borders nine miles (14 km) of the northeast shore of Catahoula Lake, a 26,000-acre (110 km2) natural wetland renowned for its large concentrations of migratory waterfowl. The 18,491-acre (74.83 km2) Bushley Bayou Unit, located 8 miles (13 km) west of Jonesville, was established May 16, 2001. This acquisition was made possible through a partnership agreement between The Conservation Fund, American Electric Power, and the Fish and Wildlife Service. The habitat found at the refuge is primarily lowland hardwood forest subject to seasonal backwater flooding from the Ouachita, and Red Rivers. The refuge is located in the Mississippi Alluvial Plain, Southern Backswamps ecoregion.
Lacassine National Wildlife Refuge is located in Cameron and Evangeline Parishes in southwestern Louisiana, was established in 1937 by Executive Order No. 7780 as "a refuge and breeding ground for migratory birds and other wildlife." The refuge is nearly 35,000 acres (140 km2) in size, including 653 acres (2.64 km2) leased from the Cameron Parish School Board. The Evangeline Parish unit is called Duralde Prairie and is currently being developed. It is located south of the city of Eunice.
Lake Ophelia National Wildlife Refuge was established in 1988 to protect the Mississippi/Red River floodplain ecosystem. The refuge is located in Avoyelles Parish, Louisiana, east central Louisiana. The refuge is named for its most prominent water body, the 350-acre (1.4 km2) Lake Ophelia that was at one time a channel of the nearby Red River of the South.
The San Luis National Wildlife Refuge Complex is located in the northern San Joaquin Valley, within Merced County and Stanislaus County of California. The complex, with four federal National Wildlife Refuges, is managed by the U.S Fish & Wildlife Service.
The Middle Mississippi River National Wildlife Refuge is located on the Mississippi River downstream from St. Louis, Missouri. It is managed by the U.S. Fish and Wildlife Service as part of the Mark Twain National Wildlife Refuge Complex.
The Two Rivers National Wildlife Refuge is located on the Illinois River and the Mississippi River in parts of Calhoun, Jersey, and Greene counties in Illinois, and St. Charles County, Missouri. It is managed by the U.S. Fish and Wildlife Service as part of the Mark Twain National Wildlife Refuge Complex.
Becharof National Wildlife Refuge is a National Wildlife Refuge in the Aleutian Range of the Alaska Peninsula of southwestern Alaska. It is adjacent to Katmai National Park and Preserve. This national wildlife refuge, which covers an area of 1,200,000 acres (4,900 km2), was established in 1980 to conserve major brown bears, salmon, migratory birds, caribou, marine birds, and mammals and to comply with treaty obligations. It lies primarily in the east-central part of Lake and Peninsula Borough, but extends eastward into the mainland portion of Kodiak Island Borough. The refuge is administered from offices in King Salmon.
The Sonny Bono Salton Sea National Wildlife Refuge is located in the Imperial Valley of California, 40 miles (64 km) north of the Mexican border. Situated at the southern end of the Salton Sea, the refuge protects one of the most important nesting sites and stopovers along the Pacific Flyway. Despite its location in the Colorado Desert, a subdivision of the larger Sonoran Desert, the refuge contains marine, freshwater, wetland, and agricultural habitats which provide sanctuary for hundreds of birds and wetland species, including several that have been listed as endangered or sensitive by the U.S. Fish and Wildlife Service.
Glenn Martin National Wildlife Refuge includes the northern half of Smith Island, which lies 11 miles (18 km) west of Crisfield, Maryland, and Watts Island, which is located between the eastern shore of Virginia and Tangier Island. Both islands are situated in the lower Chesapeake Bay.
St. Catherine Creek National Wildlife Refuge was established in January 1990 to preserve, improve and create habitat for waterfowl. Intensive management programs on the St. Catherine's Creek refuge provide excellent winter habitat and resting areas for waterfowl in the Lower Mississippi River Valley.
The 3,750-acre (15.2 km2) Clarence Cannon National Wildlife Refuge is located in the floodplain of the Mississippi River, adjacent to Pool No. 25 in Pike County, Missouri. The refuge's diversity of habitats supports waterfowl, wading birds, shorebirds, and songbirds. Although it is protected by a levee, the refuge provides flood storage in periods of high water.
The Great River National Wildlife Refuge protects approximately 11,600 acres (47 km2) along 120 miles (190 km) of the Mississippi River, stretching north of St. Louis, Missouri. Three separate units are located in the floodplain, on both the Illinois and Missouri sides of the river.
