Christmas Island is filled with a unique red, like a flood the red crabs parade through every corner of the streets, bridges, and highways of Australia. Far from being something unusual, this large group of crustaceans has made part of its annual migration journey towards the sea. Although this migration usually occurs in the November season, given the impact of the migration, Christmas Island in Australia is often called the island of the red crab. The community that lives in the area recognizes the importance of these [red] crustaceans for our ecosystem, economy, and tourism.
Millions of Red Crabs Lead a Wave of Migration in Australia
The low population density has favored the development of endemic species in its forests and beaches, of which one monopolizes the spotlight: the red crab that year after year marks the beginning of one of the most spectacular migrations in the animal kingdom, only in the rainy seasons. An adult red crab can reach up to 16 centimeters wide and as its name indicates, they are characterized by a light hue that is usually darker on their exoskeleton. Unlike other species, their pincers are symmetrical and during their stay in tropical forests, they feed on dry leaves, fruits, flowers, and seeds.
This migration is the main reason for the tourism that comes to Christmas Island every October and November when the local population and authorities begin preparations to provide the crabs with a safe path to the beaches.
The migration of Christmas Island red crabs is also closely related to the lunar cycle for a powerful reason: the influence that our natural satellite exerts on the tides. This species takes advantage of the high tide to reach the beach more quickly and release its young into the sea at a time when their chances of survival are greatest.
This story was written in Spanish by Perla Vallejo in Ecoosfera.
