Traffic jams were caused by the millions of red crabs that make their annual migrations to Australia’s Christmas Island, where they breed.

Some locals were left with no other choice but to use a rake to sweep away the crabs as they swarmed the roads on their journey from the jungle to the coast of the National Park, in Western Australia’s far northwest this week.

Tourists and locals have raced for the rare phenomenon, which is known as one of the most important animal migrations in the world. This has caused the island to turn a dark red color.

About 50 million crustaceans are known to have crossed bridges and traveled over rocks, streams, and roads to get to the beach in time to reproduce.

Amazing photos taken Tuesday by staff of the Christmas Island National Parks Team show them setting up fencing to make sure the crabs can safely breed.

Meanwhile, locals are seen picking up the crabs with their rakes to clear the way for motorists to navigate the island.

Scroll down to see the video 

Millions of red crabs have caused traffic jams as they make their yearly migration to the ocean to breed on Australia's Christmas Island

Traffic jams were caused by the millions of red crabs that make their annual migrations to Australia’s Christmas Island, where they breed.

Christmas Island locals were seen using rakes to sweep away the crabs to make clear paths for cars

Christmas Island residents were seen using rakes for clearing the path of cars and sweeping away crabs.

Around 50 million crabs are making their yearly migration to the ocean on Christmas Island to breed

About 50 million crabs make their annual migration to Christmas Island, where they breed.

Tourists and locals have raced to the island to catch a glimpse of the incredible phenomenon

Locals and tourists have been racing to see the amazing phenomenon.

Incredible photos from Tuesday show staff from the Christmas Island National Parks team setting up fences to ensure the crabs make it safely to breed

These amazing photos show the Christmas Island National Parks staff erecting fences Tuesday to protect the crabs from harm. 

Tourists have been left stunned as millions of Red Crabs are seen making their yearly migration to the ocean to breed on the picturesque Christmas Island (pictured)

Tourists were stunned to see millions of Red Crabs making the annual migration to the sea to breed on Christmas Island (pictured).

As they travel over the cliffs or through townships, the crabs can turn up at some very unusual places. 

The island’s staff spends several months prepping for migration, building temporary barriers and crab bridges. 

Daily Mail Australia was earlier informed by Dr Tanya Detto who is the coordinator of Christmas Island’s invasive species programs that there haven’t been so many migrating crabs in this area since 2005.  

Dr Detto stated that the team spent a lot time maintaining the barriers and bridges that kept the crabs safe as they traveled to Flying Fish Cove. 

She stated, “It’s been very nice to watch them being funnelled away traffic and getting there safe.” 

According to the specialist, while the experts could have predicted the route that the crustaceans would follow on the island, they were unable to predict how it would change each year.  

While there were some unfortunate cases where crabs fell from limestone cliffs or got trapped on three-storey structures, the woman said that the majority of crustaceans will survive. 

The first rains of the dry season in October and November usually trigger the highly anticipated migration. 

A few days of steady rain in the beginning of the month caused male crabs, who were unable to stay at home and marched towards the shore, picking up their females along the way. 

Bridges have been set up to ensure the crabs make their migration safely

To ensure that the crabs migrate safely, bridges were built.

Crabs are seen swarming the roads on Christmas Island this month during the impressive mass migration

Christmas Island is home to hundreds of crabs that are seen on the roads this month as part of the remarkable mass migration.

A photo taken on Tuesday shows the mass of crabs near a road on Christmas Island

Photo taken Tuesday showing the Christmas Island mass of crabs close to a road

Christmas Island has the largest population of red crabs in the world with tourists warned the crustaceans are 'protected and respected' in the area

Christmas Island boasts the highest number of red crabs worldwide. Visitors are warned to respect the species in this area.

Staff on the island spend several months preparing for the migration by building specially constructed crab bridges (pictured) and temporary barriers

The island’s staff spends several months prepping for migration. They build temporary barriers and crab bridges, as well as other special-constructed structures.

In footage of the natural phenomenon the crustaceans are seen swarming across roads, bridges, rocks and streams to reach their destination and breed

You can see the nature phenomenon as the crustaceans swarm across streams, roads, bridges and rocks to get there and then breed.

The moon phase determines when the crabs will spawn. 

These clever crustaceans are able to precisely time their departures from burrows so that they reach the beach just in time to spawn. 

Every female crab releases a remarkable 100,000 eggs to the Indian Ocean every night during migration. 

The baby red crabs, one month later will make the return trip home through the tropical forest to land on shore. 

The vast majority of larvae will be fed by manta Rays, fish and giant whale sharks, which wait around the area for their annual feast. 

The clever crabs know exactly how to time the departure from their burrows to reach the beach in time for optimal spawning on this lunar date

Smart crabs can time when they leave their burrows and reach the beach at the right time so that the best spawning time on this lunar date is achieved

The highly-anticipated migration is usually triggered by the first rainfall of the wet season that occurs in October or November

The first fall of the rainy season in October or November usually triggers the much-anticipated migration.

Bianca Priest is the Christmas Island acting manager.

“Christmas Island National Park staff set up kilometers of temporary barriers and erect signs to close roads on the island in order to protect millions upon millions of crabs that have left their forests for the coast,” Ms Priest stated.

“Over time, people have come from every part of the globe to view this natural phenomenon.”

The island’s roads may be shut down unexpectedly in order to accommodate crab movements. There are public notice boards on the island and radio stations that provide information on updates regarding their movement. 

Visitors are encouraged to park their cars and carefully walk among the sea of bright red creatures making their way to the shore

It is a good idea to leave your car at home and walk carefully among brightly colored creatures as they make their way towards the beach.

Roads on the island can be closed unexpectedly to cater for the crab's movements with public notice boards and local radio providing updates

The island’s roads may be temporarily closed to accommodate crab movements. Local radio and public notice boards provide regular updates.

The vast majority of Red Crab larvae will be feasted on by fish, manta rays and the giant whale sharks that inhabit the surrounding waters

Red Crab larvae in large numbers will be eaten by manta and fish as well as the whale sharks of the waters surrounding.

The public is encouraged to take a walk with the brightly colored crabs to the beach and to avoid parking their vehicles. 

A second species of crustacean is found on the island, called the robber crab. 

They are quite harmless, despite their intimidating appearance. Some have even been known to take items from camping sites. This is what earned them their name. 

These crabs are up to 1 m long and can be found in many unlikely places. 

Campers from the island snapped the moment last year when they were confronted by the giant robber crabs while trying to have a barbecue with their families. 

Last year, campers on the island captured the moment they were surrounded by dozens of giant robber crabs as they tried to enjoy a family barbecue

Campers from the island snapped the moment last year when they were confronted by giant robber crabs while trying to have a family BBQ.

A series of amazing photos show more than 52 of the clawsome creatures eagerly awaiting a chance to snack on some leftovers

This series of photos shows more than 52 clawsome beasts eagerly waiting to eat leftovers.

Amazing photos captured more than 52 animals eagerly waiting to eat leftovers. 

For the chance to get close to the tasty meal being cooked, crabs were seen climbing up tables and chairs. 

Amy Luetich, her family and their belongings had been on Christmas Island for several years. Then they moved to Grants Well where they stayed with other families. 

According to Mrs Luetich, she said that they have camped there a number of times but have not seen as many robbers. 

According to her, there were twenty under one tree at the time they arrived. It had begun to sprout.

The crabs were seen swarming across specially constructed bridges to make their way to the ocean in time for optimal spawning

They were seen crawling over specially built bridges in order to reach the ocean at optimal time to spawn. 

Red Crabs are considered a delicacy with aphrodisiac qualities across the Pacific, but are considered a protected species in Australia and can't be eaten

Red Crabs, which are considered delicacy and possess aphrodisiac characteristics in Pacific regions, are not allowed to be consumed in Australia.

“But they began to swarm around us as soon as I started to cook.” She recalled that her son had counted 52. 

His job was to take them out of the way and get them back. This was something he loved.

“We kept our tents far from the places we had eaten but one family said that they could hear one tap on their tent every night.” 

Christmas Island is home to the most red crabs anywhere in the world. Tourists are warned that the island’s crustaceans will be ‘protected’ and’respected’ by locals. 

Robber crabs can be enjoyed as a delicious delicacy in the Pacific. However, they are protected in Australia so cannot be eaten.  

What do robber crabs look like?

Robber crabs make up the largest land crustacean of the globe and are often found on Christmas Island.

They are up to 4 kg and can measure 1 metre across.

Some people can live as long as 50 years.

Robber crabs can be enjoyed as a good food and are considered to have aphrodisiac properties across the Pacific. However, they are protected in Australia so cannot be eaten.

Robber crabs and other animals forage on the floor in search of seeds or fruits.

Smaller robber crabs are known to consume larger ones.

Coconut crabs excel at climbing and can move quickly when it is time for food.

The name derives from the fact that it is prone to steal foreign objects and make a run for them.

Robber crabs, which are related to hermit crabs, use coconuts and seashells as protection until their hard abdomen develops.

Christmas Island driver are asked not to speed up and pass animals.

Source: Parks Australia