Every year, at the end of 10, when the rain in the tropical rain forest comes, the red crabs begin a long and arduous journey. Generally, they will stay motionless near their caves for more than ten minutes, but this time they have to walk for several kilometers, which is definitely an unusual thing for them.

The mass migration of millions of red crabs is spectacular. During the migration, the red crabs are so densely covered with the path to the coast that you can even see this wonder from the air. During the 5-7-day migration, they have to cross the dangerous areas such as roads and railways, and they have to cope with the hillside above 90 degrees. In order to protect them, the local government has built a special road crossing for red crabs, and even closed roads and railways during the peak migration period.

Golf lovers, including the post-80s generation, know how to cope with the annual invasion of red crabs. "There is a special rule in golf courses ―― if the red crab touches the ball, you can only follow the ball and hit the ball where it stopped." Fortunately, the red crab on Christmas Island brought more than just trouble. According to the news published on the website of Christmas Island National Park, their excrement is an important rainforest fertilizer, and digging holes will also play a role in turning over the soil and helping the soil to ventilate. Note: Christmas Island Red Crab Atlas website