A species of spider that usually travels no further than a few feet from where it was hatched, likely made an epic sea journey on a "land raft" from South Africa to call Australia home, a study said Thursday. The Australian trapdoor spider, known scientifically as Moggridgea rainbow, is only found on Kangaroo Island off the south Australian coast and lives a sedentary land-based lifestyle, rarely moving far. Research in the journal PLOS ONE said DNA sequences shows it actually belongs to a genus of trapdoor spiders otherwise found only in South Africa and split from its closest relatives between two and 16 million years ago.