At the beginning of the wet season on Christmas Island more than 150 million red crabs move from inland shelters to the shore for their annual breeding season. During this time, usually from October to November, the entire forest floor, and even the roads that run through it, are swathed in a sea of red in one of the most spectacular animal migrations in the world.

At the beginning of the wet season on Christmas Island more than 150 million red crabs move from inland shelters to the shore for their annual breeding season. During this time, usually from October to November, the entire forest floor, and even the roads that run through it, are swathed in a sea of red in one of the most spectacular animal migrations in the world.

Christmas Island, Indian Ocean

The 13 Most Beautiful Islands in Australia

Christmas Island red crabs smother a tree. (Photo: James D. Morgan)

Christmas Island red crabs smother a tree. (Photo: James D. Morgan)

Red crab migration | Christmas Island National Park - crabs climb down cliff to reach the sea.

Red crab migration | Christmas Island National Park - crabs climb down cliff to reach the sea.

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