Saltwater crocodiles are also residents of Palau and occur in varying numbers throughout the various mangroves and even in parts of the beautiful rock islands. Although this species is generally considered extremely dangerous, there has only been one fatal human attack in Palau within modern history, and that was in the 1960s. In Palau the largest crocodile measured in at 4.5 metres (15 ft), which is large but considered an average size throughout much of this reptile's range (i.e. in Australia 6 metres (20 ft) individuals are not uncommon.