The National Park Service (NPS) oversees more than 200,000 km2 of protected lands in Alaska. These lands, which are distributed across 16 parks, preserves, and monuments, contain some of the most important and pristine habitats for avian species in the state, including areas that are used for breeding, molting and wintering. The Southwest Alaska Network (SWAN) of national parks includes five units totaling nearly 38,000 km2 or almost 20% of all parklands within Alaska: Alagnak Wild River, Aniakchak National Monument and Preserve, Katmai National Park and Preserve, Kenai Fjords National Park, and Lake Clark National Park and Preserve.