Red crabs are native to Christmas Island, Australia. The central plateau of Christmas Island is dominated by strands of rain forest. The island has a tropical climate and experiences both a wet season (December through April) and a dry season (May through November).
More than 120 million red crabs can be found on the rain forest floor of Christmas Island. Red crabs live alone in dirt burrows, or deep rock crevices. Crabs stay in the shade of their dwelling for most of the year. In October or November, when the wet season is about to return, crabs begin their migration to the shore. This timing coincides with the lunar cycle and the tides.
This video documents the first phase of the red crab migration, just before the start of the wet season. After spending a majority of the year in the forest, males journey to the shore. There, they dig burrows for the females, and then search for a mate. After mating, the female descends into the burrow, and the male returns to the forest.
Term Part of Speech Definition Encyclopedic Entry animal migration Noun
process where a community of animals leaves a habitat for part of the year or part of their lives, and moves to habitats that are more hospitable.
small hole or tunnel used for shelter.
type of marine animal (crustacean) with a flat body, hard shell, and pincers.
lunar cycle Noun
complete cycle of visible phases of the moon, approximately 29.5 days.
movement of a group of people or animals from one place to another.
large region that is higher than the surrounding area and relatively flat.
Encyclopedic Entry: plateau rain forest Noun
area of tall, mostly evergreen trees and a high amount of rainfall.
Encyclopedic Entry: Rain forest season Noun
period of the year distinguished by special climatic conditions.
Encyclopedic Entry: season species Noun
group of similar organisms that can reproduce with each other.
rise and fall of the ocean's waters, caused by the gravitational pull of the moon and sun.
Encyclopedic Entry: tide