Millions of red crabs parade on Christmas Island

Red crabs make their way across Christmas Island, Australia to the ocean, during their annual migration. Taken on 12/11/21. See Animal News copy AN-ChristmasCrabs: This claw-some scene shows tens of millions of red crabs flooding Australia’s Christmas Island as they make their annual migration to the ocean. The sea of crustaceans swamped roads and bridges as they fled from their forest homes and trekked towards the Indian Ocean. The stunning sight creates an amazing scarlet mass and is considered one of nature’s most colourful and beautiful migrations. Photo by Animalnewsagency.Com 


On Christmas Island, red crabs have started their migration. They roam the roads and forests and offer a surprising spectacle.

The red tide has returned to Christmas Island (Australia). This weekend, millions of red crabs (gecarcoidea natalis) rushed to the Indian Ocean for their annual migration. Each year, these crustaceans emerge from the forest and head to the Indian Ocean to breed, swarming through roads, streams, rocks and beaches.

The bigger and stronger, the males, arrive on the shore before the females, a period of time that allows them to dig a burrow to accommodate them. Once the females are fertilized, the males leave the shore to begin the return journey to the humid forests of Christmas Island. But for females, the adventure continues in the burrow. In the dark, they incubate for twelve to thirteen days more than 100,000 eggs and await the signal of the final stage of their migration: low tides and a waning moon. Once these conditions are met, they rush to the ocean to deposit their offspring. If the winds and luck are on their side, a tide of baby crabs will return to the beach.

The migration of red crabs considerably disrupts the daily life of the inhabitants of the island, to such an extent that urban developments have been installed to facilitate the marathon of the animals, such as bridges over roads. However, the species is threatened by a predator from Asia, the yellow ant. anoplolepis gracilipes.

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