The blue crab species Discoplax celeste is only found on Christmas Island. It is one of more than 20 species of land crab on the island. With more than 150 million red crabs on Christmas Island ...

photographer Steve Simonsen captures thousands of hermit crabs migrating What Is an Aurora? (03:13) 5 Record-Breaking Bird Migrations (02:56) Pesto the Enormous, Viral King Penguin Molts His Baby ...

During these months, as many as 100 million red crabs scuttle into every crevice of the island. Roads are closed to provide a safe passage for the crabs. They can even find their way into homes ...