The best way to preserve wildlife is to protect the environment. Reserves and national parks can help with this protection. But not all parks and reserves are on dry land. Wetlands, such as lakes and swamps, are also protected. Marine reserves protect coastal habitats, islands and coral reefs. For example, the Florida Everglades is a wetland in the southeastern United States. Covering more than 2,400 square miles, this national park protects alligators and many species of water birds.