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In total (including killed), the ants are believed to have displaced 15–20 million red crabs on Christmas Island. [13] During their larval stage, millions of red crab larvae are eaten by fish and large filter-feeders such as manta rays and whale sharks which visit Christmas Island during the red crab breeding season.
The annual migration of red crabs in Australia begins in October/November each year. Millions of red crabs Gecarcoidea natalis migrate from the Australian islands to the Indian Ocean during this one to two-week-long period. The purpose of migration is to go underwater and lay eggs and breeding has to be made possible.
Christmas Island National Park is a national park occupying most of Christmas Island, an Australian territory in the Indian Ocean southwest of Indonesia. [1] The park is home to many species of animal and plant life, including the eponymous Christmas Island red crab , whose annual migration sees around 100 million crabs move to the sea to spawn.
Christmas Island, officially the Territory of Christmas Island, is an Australian external territory in the Indian Ocean comprising the island of the same name. It is located approximately 350 kilometres (190 nautical miles) south of Java and Sumatra and about 1,550 km (840 nmi) north-west of the closest point on the Australian mainland .
The Christmas Island shrew (Crocidura trichura) may also be extinct, [8] and the Christmas Island pipistrelle (Pipistrellus murrayi) has not been seen since 2009. [9] The Christmas Island flying fox (Pteropus melanotus natalis), the only other endemic mammal, is declining in numbers and is considered threatened. [8] Christmas Island red crab
Christmas Island is 1,500 km (930 miles) west of the Australian mainland, with a small population of 1,250, but strategically located in the Indian Ocean, 350 km (215 miles) from Jakarta.
Christmas Island, part of the New Year Group, is a 63.49-hectare (156.9-acre) granite island located in the Great Australian Bight, lying off the north-west coast of Tasmania, Australia. [ 1 ] [ 2 ] [ 3 ] : 47–49
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