As well as almost 300 species of mammal, like the bizarre, egg-laying, long-nosed echidna. There are even kangaroos that have taken to the trees. Although somewhat precariously! Did any of these animals ever travel east to other islands? Around 300 species of reptile thrive within this hot house, including the ubiquitous mourning gecko. It is a highly-adaptable creature. But did it have the tools, stamina and luck to survive being a castaway? One animal certainly did - humans.