Of course, there is much to say about the story of the traveller pigeon.

Originally, Indians hunted with smoke. After the colonists learned it, they felt it was not efficient enough. They upgraded this method and burned it directly with sulfur.

Pigeons like to hold together to deal with threats. There may be tens of millions of pigeons living in a forest. Hundreds of thousands of pigeons can fall down once smoked with sulfur.

In a record of Audubon, hunters rounded up a 300 square kilometer habitat of passenger pigeons, poisoned passenger pigeons landed like snowflakes, and even crushed the carriages used to carry the bodies of passenger pigeons.

Two farms rushed their pigs from more than 100 kilometers away to feast them.

Another hunter came up with a way to sew the eyes of a passenger pigeon, tie a rope to a branch and set up a net around it.

After hearing the news, the companion of the traveling pigeon thought there was food nearby, so they fell into the net one after another, and thousands of them could be caught in one net. This kind of traveling pigeon used as bait is called "medium pigeon".

However, there are too many contents on the outdoor display board, and tourists may be too lazy to read it.

So just a brief introduction to the extinction process of passenger pigeons.

The story of the extinction of the traveller pigeon has a great impact. Liu Wei has also heard of it!

But I just know about it. It seems that there are a lot of them because of the extinction of human beings.

I learned these details for the first time and stared in shock: "5 billion? Extinction in a century and a half? "

The two accompanying pictures of the exhibition card, the traveler''s pigeon like a dark cloud in the sky and the lonely traveler''s pigeon with only one left, also caused a great impact on him.

What is the concept of 5 billion? It seems that human beings are only more than 7 billion.

It''s a little scary to think about this. I usually live in peace of mind. I have known about the hole in the ozone layer, global warming and environmental degradation since I was a child. I can often do it on reading questions, and writing compositions is also classic material.

I only know that I mention it every year, and it''s worse every year. I haven''t felt much. I always feel that it''s something very far away from me.

If there is any huge crisis, such as fatal infectious diseases, nuclear waste water and nuclear war, how long can mankind live?

Will it disappear quickly at some point in the future, just like a traveler''s dove?

No, no, it''s terrible! A little flustered at the thought.

In front of the exhibition board of the passenger pigeon, some people were silent, sighed slightly, some frowned, thought intently, some left at a glance, and children stroked the low passenger pigeon statue with laughter.

The monitor clapped his hands: "let''s go. Let''s not look at pigeons. Let''s go to see giant pandas. I checked the strategy before and said that pandas are the most active at eight or nine in the morning! If you go later, you may have a rest. "

"Oh!" Everyone cheered and agreed.

……

Come to the giant panda museum!

Although Liu Wei saw the appearance of the giant panda museum when he watched the news before.

But at the moment, I couldn''t help but wonder: "Wow, this exhibition hall is so beautiful!"

"It''s really beautiful! Compared with the zoo here, the environment of my zoo is really the same as that of the pigsty. I thought the zoo was like that! " Some students were stunned and their world outlook was subverted.

In spring, plants grow and everything recovers!

The temperature gradually warmed up, the hot and humid air from the ocean began to be active, and there was a light rain two days ago.

The sunshine in the past few months was calm and cold. Now it is warm and bright, with a layer of soft gold.

The blue of the sky seems to become clearer.

After the rain, the plants and trees in the exhibition hall draw out fresh buds with the rising of Yang, and vitality begins to germinate.

Such a comfortable weather, Zhuang Zhuang also looks very comfortable!

Lying on her side on the green lawn, she pillowed one of her claws on her face, and her two black hind legs overlapped. Her posture was quite enchanting, like a drunken imperial concubine!

Looking at a stone in the distance, I don''t know what to think!

Or simply in a daze.

Yang Yue is like a child. She smiles sweetly and happily. Her eyes are full of excitement and some are incredible!

Turned his head and looked at Jiang Lan''s expression, exchanged eyes and seemed to say, "it''s really a panda!"

Then a string of "Hey, hey, hey" light laughter was issued!

Even the beautiful Banhua, when facing the lovely giant panda, forget what is reserved!

Everyone enjoyed the pandas and took photos with their mobile phones!

Zhuang Zhuang was in a daze for a moment. One arm was raised and extended to the sky. His leg also moved. His right leg was half bent and rubbed his belly with his heel.

Rubbing, the body gradually changed from lying on the side to lying on the back. The right foot scratched his belly and leg root, the raised arm swayed continuously with the scratch, and the left foot tilted up at some time.

Look at this, it should be very comfortable!

The crowd couldn''t help laughing: "ha ha, it''s so cute."

"It shakes well and has a sense of rhythm!"

"Swing, swing, let''s swing together!"

After scratching, the strong limbs fell back to the ground, turned over and got up.

Slowly twisting his ass and walking inside eight characters, he began to patrol the exhibition hall.

When they came to the place near the glass curtain wall, they immediately waved to Zhuang Zhuang excitedly!

"Wow, here comes the panda!"

Wu jiancong put his palm on the glass: "panda, panda, let''s slap!"

It''s still visually striking to see a broad, fat, black-and-white bear, picking up small bushes, walking with broad black bear paws from the hillside and walking steadily towards himself!

Zhuang Zhuang didn''t see them at all.

Originally, the eyesight is not good. The light in the corridor is darker than that in the exhibition area. It is a natural light barrier.

Unless it is one or two meters away from the glass curtain wall, you can see the situation inside.

Gradually, he walked away and came to a tall and strong tree.

When he found a sack, he immediately put it up and sniffed it with great interest.

The sack was hung on a strong trunk with springs and ropes, and contained some bamboo leaves.

Zhuang Zhuang is interested!

The man stood up, hugged the sack, and his mouth firmly bit the sack.

Then a spin, lying on his back on the grass!

Hold the sack and shake left and right.

Because the spring is added at the place where the sack is tied, the toughness of the sack is very good!

It was pulled to the ground and pulled by the spring. It felt like jumping up.

Holding the sack tightly, Zhuang Zhuang seems to be fighting with a very energetic opponent, wrestling and practicing boxing!

well! Ha!

Shaking around, sharp teeth tore at the sack, and soon the sack was full of holes.

But Zhuang Zhuang is not very hungry. He is playing more.

After playing twice, I felt a little tired. I didn''t want to work so hard. I loosened the sack, twisted my ass and walked away slowly.

Liu Wei saw the commentator in overalls in front of him and a circle of tourists around him. It seemed that he was explaining something, so he also came together.

The commentator was wearing a glove and holding a green round bar in his hand. He smiled and said, "who else wants to smell it?"

Liu Wei couldn''t help but have a bad idea. He raised his hand and asked, "er... What''s this?"

The announcer smiled kindly, "are you interested in smelling the panda''s feces?"