The Everglades are subtropical swamps at the southern tip of Florida. About 20% of it ― over 6,100 km² ― is protected as the Everglades National Park, created in 1947. It is a World Heritage Site since 1979. The area has a rich wildlife, especially a wide variety of birds, but the most famous inhabitants are the alligators, characterized by a broader snout and eyes more dorsally located than crocodiles. They may reach up to 5 m in length. Everglades National Park is the only place in the world where alligators and crocodiles are found living together.