Natasha then explained to him.

Kangaroos are indeed endemic to Australia, but they are not so unusual. There are 60 million kangaroos across Australia, some of which are indeed rare and protected animals.

But there are also some that are abundant. The one he encountered was only a red kangaroo, which was the largest and most numerous, and in many places it was even a pest.

Every year, the state will issue a certain number of hunting licenses to encourage people to hunt kangaroos, so not to mention a kangaroo that he accidentally killed, even if he really went hunting kangaroos, as long as he did not make people angry and publicized, it was no problem, and the state rarely cared about it.

There is no way, the number of kangaroos is growing too fast, and the state has even introduced the "Million Kangaroo Plan" to hunt millions of kangaroos every year to protect the ecological environment.

According to statistics, there were only 700w kangaroos in 2000, and in 2009, it increased to a maximum of 45 million in history, and in 2010, it increased to 5000w, which is an extra 500w kangaroos in a year!

Should this fertility be too strong...

The ability to grow so rapidly is related to its method of reproduction.

The mother kangaroo has a special ability, it has two uteruses.

Because of the two wombs, the little cub in the right womb has just been born, and the left womb is pregnant with the embryo of the little one, and it does not stop for a moment.

In this way, the left and right uterus take turns to get pregnant, and if the external conditions are suitable, the kangaroo mother has to be busy with the baby all the time.

A mother kangaroo can have a wallaby outside the bag, a wallaby inside the bag and a wallaby waiting to give birth.

Can two litters at a time not be happy.

After listening to her, Qin Yan didn't know where it was Natasha who was scaring him just now. Directly stuffed the phone to her, and in Natasha's sluggishness, she said, "Take two photos of me, and I'll send them to Moments in the future." ”

Natasha reluctantly took two pictures of him and prepared to leave. Qin Yan grabbed her and said, "What about kangaroos?"

"What do you want?"

"It's not that kangaroo meat can be eaten, I don't know what it tastes like. ”

Natasha waved her hand impatiently. "Okay, I'm really convinced, I'll find someone to pull you back. ”

Qin Yan was satisfied, and finally came to Australia to taste the taste of kangaroo meat.

The two of them rode to a hill, and from above, they could see countless sheep grazing leisurely below, and shepherd dogs watching, guarding the sheep.

Under the blue sky, the grass is green, and as far as the eye can see, looking at this quiet and peaceful scene, Qin Yan's mood is also a lot more open.

Suddenly, he noticed a collapsing earthen wall coming from a distance, passing under the hill, and stretching into the distance. Qin Yan asked strangely, "What is this?"

"Anti-rabbit fence. Natasha said four words lightly, revealing helplessness, and did not say any more.

Qin Yan was a little strange, checked it from the Internet, and was stunned.

Speaking of which, it is all the rabbit to blame, perhaps many people have heard of the Australian rabbit, but absolutely can not imagine the status represented by the Australian rabbit.

In Australian culture, the most evil animal is not the big bad wolf, let alone lions and tigers, but the lively and lovely hare in the eyes of outsiders, and the hare that is about to be eaten extinct in China.

On 27 January 1788, the First Fleet of the Royal Navy, led by Captain Arthur Phillip, landed at XN Harbour, opening a new chapter in Australian history.

The European rabbits, the ancestors of the Australian rabbits, came to this fertile land from England on ships of the First Fleet.

In 1859, an English farmer named Thomas Austin came to Australia. Among the large number of salutes he carried were 24 European rabbits, 5 hares and 72 quails.

As a standard English gentleman, Austin had a special interest in hunting, so he stocked the rabbits into his territory near Jillon. In this way, in the second year, you can enjoy riding horses and rabbits with other farmers in your free time.

The idea is good, the problem is that since Australia does not have natural predators such as eagles, foxes and wolves, the European rabbits who come here find themselves in paradise:

The climate is pleasant, the grass is delicious, there is no sign of the enemy around, and the soil is loose, so it is very convenient to make holes and nests.

And so, a terrible expansion with almost no restrictions began.

The rabbit's reproductive ability is super strong, people can play with blood, people can estrus within a period of time after giving birth, when the rabbit is only a few days old, while feeding the rabbit, while breeding cubs, a litter a month, a litter of seven or eight. The fertility rate is called a fast.

It's nothing, Australia is a huge area, and a few rabbits are nothing. The problem is that another person died, and in Capuda, South Australia, a group of rabbits were released into the wild, which led to the disaster.

After the victory of the two armies, the rabbit multiplication and expansion rate accelerated dramatically. They spread in all directions at an average speed of 130 kilometers a year.

By 1896, the rabbits' sphere of influence had extended north to Queensland, south to South Australia, and across the Australian continent to Western Australia.

The population of rabbits as a whole also increases exponentially. In 1890, the number of rabbits in New South Wales alone was estimated at 36 million. By 1926, Australia's rabbit population had grown to a record 10 billion.

Well, this number seems staggering, but for many people there is no concept, so let's think about it differently.

A rabbit does not eat too much, ten can eat the food of one sheep, then ten billion will eat the food of a billion sheep.

Australia is known as the "country on the back of sheep", the number of sheep ranks first in the world, how many, 200 million, an average of ten sheep per person, it seems to be a lot, but the rabbit can eat the food of one billion sheep, five times more than the number of sheep.

What a concept this is, enough to be dumbfounded.

In order to curb the spread and breeding of rabbits, the hardworking and brave people of Australia have really exhausted all means.

From the most traditional hunting → laying nets → plugging holes, to the more "advanced" release of poison gas and poisoning carrots, Australians have tried it all.

The problem is that it is not very useful, the rabbit is still growing like crazy, and in order to eliminate the rabbit, the Australians have taken advantage of another alien creature, the rabbit's natural predator - the fox.

In the beginning, this approach worked, but Australians soon discovered that foxes may prefer to eat locally produced marsupials, which are relatively slow.

In order not to make these precious species extinct, Australians had to go back and eradicate foxes.

Eat and eat, eat grass and eat leaves, as long as you encounter something that can be eaten, all of them are gnawed clean, and the Australian green grass you eat becomes a desert, and the desert becomes a desert, and Australia almost perishes the country.

The fence wall is a product of this time.

In desperation, Australians came up with a very primitive, but perhaps more effective, solution: to build a fence that would run through the continent to block the rabbits' path before they continued to spread to the most fertile agricultural areas in the west.

In December 1901, with the approval of the Australian Government, the construction of the largest fence in human history began.

After seven years of hard work, the world's longest fence was completed, starting from the Australian port of Stravesting and stretching north to Worrraldowns, crossing the north and south, dividing Australia in half, which is an Australian version of the Great Wall.

It's just that it was not used to resist the invasion of the Huns, but to prevent the spread of rabbits.

Unfortunately, before the fence was completed, it was discovered that rabbits had already crossed the fence.

In desperation, the Australians continued to build a second and third fence to keep the rabbits at bay.

Together, the total length of the three fence works is more than 3,000 kilometers. In desperation, hard-working Australians have created a new miracle of the world.

Unfortunately, the fence was completed, but it didn't take long for the fence walls to be scarred and the rabbits were born with their natural ability to burrow, thanks to a combination of floods, strong winds and even kangaroos.

The painstaking construction of the fence wall did not make any difference, and the disappointed Australians had to give up the maintenance of the fence wall. No one cared about the wind and sun, and then it became like this.

In some places, it is a fence wall, and in some places, it is directly made of stone masonry, and the ground is even dug to a depth of nearly one meter to prevent rabbits from burrowing through.

Qin Yan looked at the eyebrows flying, who would have thought that Australians would have such a glorious history, being eaten by rabbits and almost dying, it is worth mentioning that this is not the end of their struggle, even now, the Australian government still regards rabbits as flood beasts, and some places even stipulate that rabbits are not allowed to be kept as pets, and offenders will be fined 40,000 yuan, which is not much, that is, 200,000 yuan.

Later, the Australian government also used the air force to sow poison and conduct three-dimensional warfare and chemical warfare, hoping to kill the rabbits. The trick did work at first, and the rabbits were killed and wounded.

However, due to the amazing reproductive ability of the rabbits, the rabbit colony continued to thrive shortly after the spraying. The poison sown had a negative impact on the ecology of the grassland, and the Australian government had to abandon this method, and the rabbits once again won the "anti-encirclement and suppression" struggle.

It was only in the middle of the twentieth century, with the rapid development of science and technology and the development of toxins specifically targeting rabbits, that the rampant rabbits were suppressed.

No wonder Natasha is reluctant to say, this history is indeed disgraceful, he can't help but mourn for the Australian people, 10 billion rabbits almost wiped out the country, why didn't they think of inviting the people of the big foodie empire to go, people can eat 500 million rabbits a year, this is still because there is no place to hunt, can not catch rabbits, can only breed the result, if they are invited to go, it will be a few years, to ensure that the rabbits eaten are extinct.

It is ironic to say that two hares rushed out of the ruins of the fence wall and fled into the distance.