See the Red Crab Migration
Christmas Island & Cocos (Keeling) Islands
When: October and November
The Christmas Island red crab is a species of land crab that is endemic to Christmas Island and the Cocos (Keeling) Islands in the Indian Ocean. Although restricted to a relatively small area, it has been estimated that 43.7 million adult red crabs lived on Christmas Island alone.
During breeding season swarms of crimson-colored crabs head for the coast to lay their eggs in the ocean. On their way, they cross roads and dodge many obstacles and try to avoid dangers such as cars, pets, and birds. More recently they are facing a much larger threat from an exploding population of the yellow crazy ant, an invasive species accidentally introduced to Christmas Island and Australia from Africa.