Saturday, January 30, 2021

Walk the red crab carpet

By Tourism Australia


Christmas Island 40 million of red crabs migrate to ocean for breeding
PHOTO: Christmas Island 40 million of red crabs migrate to ocean for breeding
Every year the roads through Christmas Islands become a "living red carpet" as millions of red crabs emerge from the forest and make their way to the ocean to breed, and one business owner has designed "crab-safe" car attachments to allow his staff to drive during the migration period. [2]
Picture posted by Verity Hughes on Monday, 02 November 2020 at 7:40am - Christmas Island red crab migration

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8xscDnGHsS3mdtpSHF46yu2gf3N7NM7cKEWWMC7vsyQVKbaI_TPrq8gP5Fl_OwxK2ZUjubjq8sv2_xkM_yvJI9EsC59QKg-17OLsOW2Aab3_OIiSM7H5P2xxSb9qUE1tpJ5aTuE4TA1c/s862/12837172-16x9-xlarge.jpg
https://www.abc.net.au/cm/rimage/12837172-16x9-xlarge.jpg?v=2
https://www.abc.net.au/news/2020-11-02/red-crab-migration-christmas-island-traffic-solution/12837112



When the weather heats up in Australia, so does its wildlife. The warm summer months of December, January and February are a fantastic time to join a wildlife-watching tour to see some of the country’s most iconic creatures, especially as many of them have babies at this time of year. Get ready to say: “Aww”!


Red crabs live on Christmas Island and millions migrate to the ocean each year to breed.
PHOTO: Red crabs live on Christmas Island and millions migrate to the ocean each year to breed.
The traffic from the crabs is so dense it closes the island's roads and has become a tourism drawcard.
Owner of one of the island's accommodation providers, Chris Bray, said the sight was spectacular but it caused chaos for traffic. [2]
Photo supplied by Chris Bray
Picture posted by Verity Hughes on Monday, 02 November 2020 at 7:40am - Christmas Island red crab migration

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvREExFxT9SYgkCESs8UtDQr3LPaZZ3T6UcvZ-mzoMW4H4DyjX0UTDw4ajO7MVeEB2N60S9VOjNfjSVySP6mQZuRAqAJ09nrE-uIH_kERH4gyoWtyuX3Kb1LclZbaBCCKXWscJeY9KQPQ/s862/12837184-3x2-xlarge.jpg
https://www.abc.net.au/cm/rimage/12837184-3x2-xlarge.jpg?v=3
https://www.abc.net.au/news/2020-11-02/red-crab-migration-christmas-island-traffic-solution/12837112



When: December
Where: Christmas Island, Western Australia

You won’t see anything like this anywhere else. Every year, when the first summer rains begin to fall, 50 million red crabs march, en masse, from the lush rainforest in the middle of Christmas Island (a 3.5-hour flight from Perth) down to the sea, where they mate and spawn in the world’s biggest beach party. It’s an extraordinary sight, with roads and pathways across the island transformed into rippling red ribbons of crabs that cover every obstacle in their path. There are even special crab bridges to help them get across the roads! The migration lasts up to 18 days, and it’s just as impressive when the crabs make their way back to their burrows in the rainforest post-beach-party.


The incredible sight, described as 'one of the wonders of the natural world'
PHOTO: The incredible sight, described as "one of the wonders of the natural world," takes place on an island with such a variety of species that it's known as the "Galapagos of the Indian Ocean," according to the island's tourism website. [3]
Picture posted b Claudine Zap on 03 December 2013
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https://s.yimg.com/ny/api/res/1.2/_XQ3qMpplzHgqBiq7okaxQ--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTYzMS43ODM3ODM3ODM3ODM3/https://s.yimg.com/os/en-US/blogs/compass/1road-crabs.-Credit-Di-Masters.jpg
https://sg.news.yahoo.com/blogs/compass/crab-walk-millions-migrate-australia-christmas-island-200512079.html



Between 40 and 50 million red crabs live on Christmas Island and Mr Bray says the crabs know exactly where to go. "A lot of the roads just get so densely covered in this living red carpet, so national parks close them up for a couple of months to let the crabs do their thing," he said.

"They all have to congregate on the coast at the right particular phase of the moon and the right tide to be able to cast their eggs into the seas," he said.


An Australian wildlife official inspects migrating red crabs on Christmas Island, in 2013.
PHOTO: An Australian wildlife official inspects migrating red crabs on Christmas Island, in 2013.
A Tiny Island. Millions of Crabs. Terrifyingly Awesome Photos. But climate change could disrupt their spectacular annual migration. [4]
Photo by Xu Yanyan/Xinhua/ZUMA
Picture posted by James West, Deputy Editor, Digital on 12 December 2014

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqDyv8bS9vwxbAw6nqN8EbL0B8iMLKE8EaOmBj4CYs7Iv7G94DMWYs4pcyeyJ11oEUWZfel8p7bDZSfRk4GbwzB0sI8KZIFDFloXBl1svm_QkQTj31Qp0Q3LKu96UMiPcwfX4qJ7HRJKo/s630/rebbeach2.jpg
https://www.motherjones.com/wp-content/uploads/rebbeach2.jpg
https://www.motherjones.com/environment/2014/12/photos-australia-christmas-island-red-crab-migration-climate-change/



"It's an incredibly well-synchronised event."

Mr Bray said if it rained too close to the spawning date and there was not enough time to migrate, the crabs held off migrating until the next month.

Crabmobile 'beats walking in rain'
Mr Bray installed 'crab sweepers' to his vehicle, which slowly bump the crustaceans out of the way, to help get through the mass movement of the red crabs each year.


Specially designed sweepers on each wheel of Mr Bray's vehicle brush migrating crabs out of harm's way.
PHOTO: Specially designed sweepers on each wheel of Mr Bray's vehicle brush migrating crabs out of harm's way. [2]
Photo supplied by Chris Bray
Picture posted by Verity Hughes on Monday, 02 November 2020 at 7:40am - Christmas Island red crab migration

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDsirqAYrcC2sUTSlNCie0X_OE1vuQBQT6Pu83ovkRgQ3OQ0_pbTXfVmyx5Nr925yRmdVksU0mMso4xnt6LleiY229qIxJp6ByCnsSGawWU-voY93ZeXnsWBGd7RzC88EyqdlXk7y61hU/s862/12837666-16x9-xlarge.jpg
https://www.abc.net.au/cm/rimage/12837666-16x9-xlarge.jpg?v=4
https://www.abc.net.au/news/2020-11-02/red-crab-migration-christmas-island-traffic-solution/12837112



"Everyone was like, 'How are you going to access the lodge when the crabs are migrating?' So, I built a crab-safe vehicle attachment," he said.

"You have to drive quite slowly, about the same speed as walking really.

"But it sure beats walking if it's raining or if you're lodge staff and you need to get supplies in and out."

Along with red crab traffic, visitors must be wary of some other crabby neighbours.


So many crabs.
PHOTO: So many crabs. Before sunrise on these mornings the females will release their eggs into the ocean—timed perfectly for the receding tide. [4]
Photo from Max Orchard/Parks Australia
Picture posted by James West, Deputy Editor, Digital on 12 December 2014

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheN9_cwTYAn8vnL8nkWhriTXykiLaLBX8Y5X7E3jijYD2cdyz13fwPedizU7LIe4bOUKKPhgbY8mf3fNNcV10NcgkuZxSouz6pmHi72nv5ZVCgd-2dVL86akF3AEQjFqIxzx1p5JywD0o/s630/pileofcrabs.jpg
https://www.motherjones.com/wp-content/uploads/pileofcrabs.jpg
https://www.motherjones.com/environment/2014/12/photos-australia-christmas-island-red-crab-migration-climate-change/



"It's the robber or coconut crabs that sometimes come along and steal the guests' shoes," Mr Bray said.

"[If] anything that smells or has a smell on it, they'll come along and drag it into the jungle somewhere.

"Guests will wake up and be like, 'Where are my shoes gone?'. Sometimes you find them, sometimes you don't."


Christmas Island Red Crab
PHOTO: Christmas Island Red Crab
Christmas Island is an Australian territory in the Indian Ocean. Christmas Island Red Crabs are around 4.5 inches (11.6 cm) and commonly found in the island rainforests.
Renowned for their annual mass migrations of around 50 million crabs, they begin their journey to the ocean for breeding during the wet season in October-December. [5]
Picture posted by Art by Breah! on 09 December 2018 - Christmas island red crab

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjs9UQlejogH7NBqvx7ouxbQ1AGFEuYTFzG8azwzCj6NZEzJEPw3NuAx5xWU-LYY-OVG60a5R0V_Ev7H8HNLKClbVTkak1p-N8VX64_EOqfeHIdSn1AsSR_QjPhdvh29pD0QDxSVVW0c2Y/s840/christmas-island-red-crab-painting.png
https://artbybreah.files.wordpress.com/2018/12/christmas-island-red-crab-painting.png
https://artbybreah.com/2018/12/09/christmas-island-crab-painting/



A single female can lay up to 100,000 eggs, they hatch as soon as they come in contact with the ocean.
PHOTO: A single female can lay up to 100,000 eggs, they hatch as soon as they come in contact with the ocean. Swarms of larvae are washed out to sea where millions of them become food for plankton eating filter feeders like manta rays and whale sharks.

After about a month at sea, the larvae will grow through several larval stages and develop into a prawn-like form known as megalopae. They gather close to the shore for one to two days and become what finally resembles baby crabs.

Measuring only 0.19 inches (5mm), billions of baby crabs make their way back to the rainforest plateau, eventually starting the cycle over again.

Christmas Island Red Crabs are scavengers, eating mainly fallen fruits, flowers and leaves, but also carrion (the remains of dead animals).

They are usually found hiding in burrows or under leaves to help conserve moisture – if the crabs dry out, they’ll die. [5]
Picture posted by Dr. Martina Di Fonzo, WordPress.com on 19 April 2017 - Christmas Island Red crab

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSrU7AP28Uk0zXM7COJ6pj8NmpgmW-KY1IkYdSnHGcMdWc2rvr8SiZv9PXC5HIwLtMuPhT5r2AEYX_hdBCxFEaZV3lIr5IIyQeJKGQGJBP-fs1GpJOHYeb-TY5PgwcYfQRHAL5_l2MYog/s2048/xmas-island-crab.jpg
https://martinadifonzo.files.wordpress.com/2017/04/xmas-island-crab.jpg
https://martinadifonzo.wordpress.com/xmas-island-crab/



Google Street View Captures Incredible Migration of 10 Million Stunning Red Crabs to Christmas Island.
PHOTO: Google Street View Captures Incredible Migration of 10 Million Stunning Red Crabs to Christmas Island.
Christmas Island is a small Y-shaped piece of land southwest of Indonesian island of Java. More than half the island is an Australian national park, although the island is home to about 2,000 people as well. [6]
Picture posted by Meghan Bartels on 23 December 2017 at 9:00 AM EST

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjzsOswLPLDnPuQJAQPSysv8tbhBGaeiE9w9cGk7zXoCRy864VRSk2UB_Ham8RKsJ-jc6EJMs6rMEUH9SAzyroQNbow66mPOcyNqvP_UBHXzSassEsoBeV4t1UmZ5kHevIcScZuN48zvcg/s737/12-22-christmas-island-crab.png
https://d.newsweek.com/en/full/757777/12-22-christmas-island-crab.webp?w=737&f=8b4d859137c490f41b0ddd22e9a2e718
https://www.newsweek.com/google-street-view-captures-incredible-migration-10-million-stunning-red-crabs-757805



Red crab eggs hatch and the young larvae immediately as live in the sea for a month before returning to the coast, changes in breathing air, and slowly returning to the countryside to begin a new cycle.
By Tourism Australia
Reference
[1] Tourism Australia, Walk the red crab carpet, https://www.australia.com/en-sg/things-to-do/wildlife/summer-animals-and-wildlife-events.html?cid=online-media|sg|SG-Content_Amplification_Wave2_2020_12.05.001|brand|Outbrain|Standard|1x1_Publishing|||||Outbrain_Image_Wildlife_SummerWildlifeEvent|||

[2] Verity Hughes, Solution to Christmas Island traffic woes as 40 million of red crabs migrate to ocean for breeding, posted on Monday, 02 November 2020 at 7:40am, https://www.abc.net.au/news/2020-11-02/red-crab-migration-christmas-island-traffic-solution/12837112

[3] Claudine Zap, Crab walk: Millions migrate on Australia’s Christmas Island, posted on 03 December 2013, https://sg.news.yahoo.com/blogs/compass/crab-walk-millions-migrate-australia-christmas-island-200512079.html

[4] James West, Deputy Editor, Digital, A Tiny Island. Millions of Crabs. Terrifyingly Awesome Photos, posted on 12 December 2014, https://www.motherjones.com/environment/2014/12/photos-australia-christmas-island-red-crab-migration-climate-change/

[5] Art by Breah!, Christmas Island Red Crab, posted on 09 December 2018, https://artbybreah.com/2018/12/09/christmas-island-crab-painting/

[6] Meghan Bartels, Google Street View Captures Incredible Migration of 10 Million Stunning Red Crabs to Christmas Island, posted on 23 December 2017 at 9:00 AM EST, https://www.newsweek.com/google-street-view-captures-incredible-migration-10-million-stunning-red-crabs-757805



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