Animals

Why do the red crabs migrate on Christmas Island?

Once a year, the red crabs on Christmas Island go to the sea - and back again. Why?

Red crabs migrate to pup

Around 120 million land crabs live on Christmas Island in the Indian Ocean, who leave the jungle en masse once a year and migrate to the sea to mate.

Their migration from land to sea takes place from October to December, when the rainy season starts. The air is then moist, which creates the ideal conditions for the five to seven day long journey. The crabs mate in dimples on the beach, and while the males return to the forest, the females lay eggs.

Land crabs lay eggs in the sea

The females lay their eggs in the sea when the difference between tide and low tide is smallest and it is safest for them to crawl to the water and entrust their eggs to the sea. The eggs hatch immediately upon contact with the water, and after a month in the sea, the crabs crawl onto the land and make the nine-day journey to the rainforest.

During the migration of the red crabs, several roads on the island are closed, so that not too many crabs are killed.

View the great migration of the crabs

Come to the world of the red crabs, Christmas Island south of Indonesia, and find out immediately how the island got its name.

Video: Red Crab Migration Across Christmas Island (December 2019).

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