The Australian Red Crabs from Christimas Island! Every year, millions of red bright crabs let their burrows in the Christimas Island, Australia, and start a long and labourious jorney toward the sea. They decend slopes, climb dunes and manauver around obstacles to get to the Coast and put their eggs, finally returning to the Island's Center carrying their young ones(?) on the back. The sincronized migration resembles a Surging Red River around all the Island and can last up to 18 days. The event often takes place in November or December (the crabs just start their jorney if it's rainning) and coincides with the turning of the tide and the arrival of the waning moom.