At night, the forests are eerily quiet Only a handful of bats made it here,the only mammals to do so, and there are far fewer birds In the absence of ground predators, invertebrates evolved into monsters This millipede is one of the biggest of its kind, running almost a foot long Its diet of rotten vegetation may have sustained its ancestors on their long journeys to these distant shores But how did they get here? Perhaps more surprising, two species of frog also made it to Fiji Surprising because adult frogs quickly die in saltwater But the ancestor of this frog may have arrived here as a tadpole Tadpoles normally need pools of freshwater to develop in, but these actually mature inside the egg So, on long journeys, these eggs would have been like little survival capsules But the question remains - how did they ever reach these islands? Maybe the same way as Fiji's most intriguing castaway of all