Which animal found in Australia is the largest reptile in the world?

The Australian crocodile is the largest living reptile in the world. Also known as the Estuarine or Saltwater Crocodile, adults average 3 to 5 meters in length! In Australia, Estuarine Crocodiles are found in northern coastal areas, including drainages, rivers, estuaries, creeks, swamps, lagoons, and billabongs. Wonder how these large reptiles can return home to their territory after being captured and displaced and learn about the different ways they communicate with each other.

Source: Australian Museum