Monte Vista and Alamosa National Wildlife Refuges (NWR) are found in the heart of Colorado's San Luis valley. The artificially created wetlands on Monte Vista NWR's 14,804 acres are intensively managed to provide habitat for a wide variety of waterfowl and other water birds. Mallards, pintail, teal, and Canada geese are common, as are American avocets, killdeer, white-faced ibis, egrets, and herons. Irrigation canals and wells provide precious water to maintain important wetland habitat.