Restoration, as defined in the NRDA Restoration statutes and regulations, encompasses activities to restore, replace, or acquire the equivalent of the injured natural resources. Due to the breadth of this definition and the variety of natural resources managed by Department of the Interior bureaus and co-trustees, restoration can take many forms. Successful restoration of injured resources relies on the dedicated effort of NRDA Restoration practitioners within the Program and many partner organizations. Examples of restoration projects implemented throughout the country include: the addition of habitat to Fish and Wildlife Service Refuges, National Parks, state parks and tribal lands; invasive species control; fish passage in streams and rivers; construction of bird nesting islands; wetland, saltmarsh, and eel grass bed restoration; and endangered mussel reintroductions. A few examples of successful restorations are highlighted below.