Christmas Island - Migration of Christmas Island Red Crab

Christmas Island National Park
Migration of Christmas Island Red Crab Gecarcoidea natalis

Sent by The General Manager of The Sunset. Terima kasih banyak-banyak (thank you very much).

Christmas Island - Baby Red Crabs

Emerging baby Red crabs (Gecaroidea natalis) making their way from the ocean to the forest, via all obstacles.

Sent by Shikin from Christmas Island.

This is from Wikipedia : The Christmas Island red crab, Gecarcoidea natalis, is a species of land crab that is endemic to Christmas Island and the Cocos (Keeling) Islands in the Indian Ocean. Although restricted to a relatively small area, it has been estimated that 43.7 million adult red crabs lived on Christmas Island alone, but the accidental introduction of the yellow crazy ant is believed to have killed about 10–15 million of these in recent years. Christmas Island red crabs eat mostly fallen leaves and flowers, but will occasionally eat other animals, including other red crabs (see cannibalism) if the opportunity arises.

The carapace is up to 116 millimetres (4.6 in) wide, rounded, and encloses the gills. The claws are usually of equal size, unless one becomes injured or detached, in which case the limb will regenerate. The male crabs are generally larger than the females, while adult females have a much broader abdomen (only apparent above 3 years of age) and usually have smaller claws.

Christmas red crabs live in burrows for shelter from the sun. Since they breathe through gills, the possibility of drying out is dangerous. They are famous for their annual migration to the sea to lay their eggs in the ocean.

Early inhabitants of Christmas Island rarely mentioned these crabs. It is possible that their large population size was caused by the extinction of the endemic Maclear's Rat, Rattus macleari in 1903, which may have controlled the crab's population. Surveys have found a density 0.09–0.57 adult red crabs per square metre, equalling an estimated total population of 43.7 million on Christmas Island. Others have estimated that about 120 million are found on this island, but the basis for that claim is unclear.

An exploding population of the yellow crazy ant, an invasive species accidentally introduced to Christmas Island and Australia from Africa, is believed to have killed 10–15 million red crabs (one-quarter to one-third of the total population) in recent years. In total (including killed), the ants are believed to have displaced 15–20 million red crabs on Christmas Island.

Christmas Island - Flying Fish Cove

Flying Fish Cove (also known as "The Settlement" and "Kampong"
Christmas Island, Australia.

Sent by Shikin from Christmas Island.

This is from Wikipedia : Flying Fish Cove is the main settlement of Australia's Christmas Island. Many maps simply label it “The Settlement”. It was the first British settlement on the island, established in 1888. The cove is named after the survey vessel HMS Flying Fish.

About a third of the territory's total population of 1,600 lives in Flying Fish Cove. It is located in the northeast of the island; there is a small harbour which serves tourists with yachts, and an airfield some kilometers southeast from Flying Fish Cove. It is possible to dive at the settlement's beach.