"I have a safari park ( to find the latest chapter!

In fact, Xiao Zhang just gave tourists a simple science popularization. After all, this is the Wolf Hall, which mainly introduces wolves. The reason for the decline in the number of elk in Yellowstone Park is more complicated than this.

One reason is the decline in the pregnancy rate of the doe. At first, people thought it was caused by the scare of the wolf. Later studies found that it had nothing to do with the wolf. It was mainly due to the severe drought caused by climate change. Decrease, the doe's malnutrition, so the pregnancy rate has dropped a lot.

Another reason for the decline in the number of elk is the increase in the mortality rate of fawns. 70% of fawns die in the first year after birth. Biologists tracked the fawns and found that only a small part was hunted by gray wolves, and most of them were killed by gray wolves. The bear hunted.

In the past, grizzly bears in Yellowstone seldom hunted elk. Their favorite food was cut-throated trout in the river. However, in the 1980s, fishing enthusiasts stocked lake trout into the lake, leading to a common invasive species extermination of native species. Tragedy, the lake trout killed the cut-throated trout.

Lake trout is different from cut-throated trout. It lives in the depths of the water. Grizzlies can't prey, so they can only turn to deer.

Whether it is the extremely frequent extreme climates in recent years or the invasion of alien species, in fact, they are inseparable from human activities.

Therefore, the ecosystem is very complex, and it is simple to destroy, but once it is destroyed, it is difficult to restore, and it can never be restored to its former state.

After listening to Xiao Zhang’s narration, a father showed a thoughtful gaze: “I did have a prejudice against wolves before. I originally wanted to tell my daughter the story of Little Red Riding Hood and the Big Bad Wolf. I feel better to tell her the story of Yellowstone Park and the wolf. Let’s talk about the role of wolves in the ecological environment!"

The old man sighed: "Oh, so not only dogs are good friends of mankind, but wolves are also good friends of mankind!"

Xiao Zhang smiled and praised: "Uncle, you are right. In fact, animals are all our human friends."

A tourist murmured: "Are flies, mice and mosquitoes also friends? Anyway, I will definitely fight when I see them."

Suddenly someone chuckled.

Although there is a suspicion of raising the bar, Xiao Zhang thought about it and explained it seriously: "These animals are really annoying to humans. I also see a mosquito slapped to death every day.

However, animals like rats and cockroaches, if they do not deal with decaying food and carcasses, will breed more bacteria and diseases, and rats are still food for other animals such as owls, wolves, and foxes, so they are also essential in the ecosystem. Indispensable. "

The tourists saw a rare scene of wolves eating meat, deepened their understanding of wolves, and learned so much knowledge. Thanks to Xiao Zhang's explanation, they left with satisfaction.

Zhuang Xiaobai came in backwards, and there is still a lot of content that I haven't read.

All the way to visit, I was obsessed with sucking wolves and couldn't help myself. After I turned around, I came out of the cave in front and looked at the time. I was surprised to find that it was 11 o'clock!

I walked around the wolf hall for an hour without knowing it.

It was almost time for lunch, he was going to visit the Tiger Pavilion again, and he would go to have a meal after watching.

Looking forward to it, I don’t know what surprises the Tiger Hall, which is the most respected in the Raiders, can bring him?

Tiger Pavilion, Fang Ye is also here at this time!

Came over with a watermelon, smiled and beckoned to the two tigers on the edge of the pool, and said hello: "Jiaojiao, sorbet! I'm coming to see you!"

Some tourists with unknown conditions saw a person appearing in the exhibition area and exclaimed: "Damn, what is the situation, why did someone run in?"

Tourists who knew the situation took the initiative to explain at this time: "It's okay, this is the director Fang! He is called the Metropolis Druid, and it's common for people to pick up a tiger."

"Brother, really?"

In front of the glass curtain wall, the keeper Xiao Bao explained to the visitors: "Uh, don't panic, the person inside is our director! Our director is respected and loved by all the animals in the zoo, including tigers.

Remind everyone, do not imitate dangerous behaviors. Tigers will not have such a good temper with strangers. Even those of us who feed tigers usually don't dare to make unprotected contact without the company of the director. "

Although Zhuang Xiaobai had heard about the existence of such a **** in Linhai Zoo before, it was incredible when he saw it: "Humans and tigers can get along so closely. It's a bit powerful."

Then he noticed a watermelon in Fang Ye's arm, a little strange: "Is this going to feed the tiger a watermelon? The tiger is not vegetarian, right?"

Jiaojiao was taking a tiger step at this time, walking leisurely on the edge of the pool, looking in a good mood, while the sorbet was lying on the grass and fell asleep, shaking her ears without any response.

Seeing Fang Ye coming, Jiaojiao glanced at the sleeping sorbet, lowered her head to bite its neck, grabbed the sorbet and brought it to him, her big amber eyes looked at him gently, as if It is the same as in the performance: "Look, I will take the child well!"

Sorbet was originally asleep, UU reading www.uukanshu.com was hung in the air by his neck, stunned, his eyes half-opened, his eyes were full of doubt and unhappiness: "What's wrong? What happened?"

The tourists were amused: "Hey, this little tiger, with a happy expression on his face!"

"Little tiger said, Mom, it's so shameless for you to hold me like this!"

"Children are willing to take it in their mouths. This is the only way to do this with trust. It can be seen that the relationship between the principal and the tiger is really good!"

Jiaojiao put the sorbet on the ground. The sorbet was held for a relatively short time, and she shook her body and stood firm.

Seeing his favorite Fang Ye, he suddenly forgot the unpleasantness he had just now, "Wow, ah, ah," yelled happily, greeted him with dad, and jumped over and naughty hugged his shoes and bit him.

Fang Ye patted Jiaojiao's head, rubbed it, and said in a soft tone: "Hi, good girl, you have worked hard to take care of the baby. But you don't need to bring the sorbet over, I just walk over by myself."

I couldn't help but want to hug Jiaojiao's neck with two hands together, but I can only touch it with one hand while holding a watermelon in his hand.

Today I brought the watermelon, it is indeed for the tiger to eat!

In fact, tigers not only eat meat, they are also vegetarian, and they can eat some fruits and berries.

Although cats have a weak absorption capacity for plants, they can obtain vitamins and minerals from plants that are not found in meat foods. Vegetarianism is not to satisfy hunger.

The other is that when tigers in the wild eat, they basically swallow meat with their belts. In addition, they often use their tongues to clean their fur. These hairs accumulate in the tiger's body and are not conducive to digestion. At this time, the tiger will eat. Point grass and use the indigestible grass to help adhere to the indigestible hair and bones to form hair masses and discharge them.