Time：2023-03-27 15:25:43 source：ucutxmastrees.com author：Beast Read：771次

A giant panda was found in Sichuan, wandering in the bamboo forest, and beside a tree, performing "upside-down peeing"

The Giant Panda National Park covers a wide area, with high forest coverage and diverse ecological types. It is one of the first national parks in my country and one of the areas with the highest biodiversity in China. The original intention of the establishment of the Giant Panda National Park is to protect the stable development of giant panda populations and the overall protection of their habitats. However, because the giant panda is a famous umbrella protection species, and the umbrella protection effect is very strong, all wild animals in the park benefit. The Giant Panda National Park is located in the middle latitudes, in the monsoon climate zone where the continental north subtropical zone transitions to the warm temperate zone. , horse musk deer, golden eagle and many other national key protected animals. A giant panda was photographed by an infrared camera on a hillside of Wawu Mountain in the Meishan area of ​​the Giant Panda National Park at an altitude of 2,067 meters. It was seen that it had a round body and sturdy limbs. It was walking up the hillside animal trail. There are many surrounding Large trees, bamboos grow well, this kind of environment is the favorite of giant pandas. Because the good growth of bamboo means that there is no need to worry about eating and drinking, and the large trees are for it to climb. Giant pandas like to play and have high tree-climbing skills. They can also use tree-climbing to avoid predators. This discovery not only captured the wild giant pandas, but also captured interesting pictures. During the journey, the giant panda came to a big tree, and then performed a "handstand peeing".

A brief history of giant panda evolution

It is often said that the giant panda is the "living fossil" of the animal kingdom, so do you know what that means? ? They have lived on Earth for millions of years and are one of the oldest living things in the world. The early ancestors of giant pandas were not as cute as they are now, but looked like a fat fox. Regarding the evolutionary history of giant pandas, the mainstream view is that the earliest date can be traced back to 8-9 million years ago. In the late Miocene, there lived a small carnivore called the Elephant Panda. It had fangs and sharp claws. It belonged to the pseudo-bears and could prey on some small animals. Compared with contemporary giant pandas, the first panda is completely meat-eating. Over time, in the early Pleistocene, the primordial panda evolved into a small species of giant panda. Compared with the original panda, the Xiaozhong giant panda already has the image of the contemporary giant panda in appearance, but it is less cute. The small species of giant panda has distinct black and white colors, and at this stage, it has evolved to mainly eat bamboo. In terms of body size, the small species of giant panda is relatively small, half the size of today's giant pandas, with a body length of about 1 meter. Then, in the middle and late Pleistocene, the giant panda appeared. It looked like a complete beast and was one-eighth larger than the modern giant panda. It is worth mentioning that in the stage of the giant panda, the giant panda family reached its peak, and its distribution range was very wide, even extending to Vietnam and Myanmar for a time. The modern giant panda stage is the fourth stage in the evolutionary history of giant pandas. During this stage, they almost completely gave up meat, and used bamboo as their food, accounting for 99% of their diet. Many people think that giant pandas feed on bamboo and bamboo shoots. In fact, it is not. It can eat about 50 kinds of plants in the wild, but bamboo accounts for the majority. In addition, the giant panda still retains the professional "equipment" of carnivores, with sharp teeth and claws, as well as the digestive system of carnivores. And in life, they will occasionally eat meat and beat their teeth. During the winter Daqingshan activities in 2021, the rangers of the Foping National Nature Reserve in Shaanxi found a giant panda gnawing on a takin bone. In February 2017, a giant panda in Leshan also broke into the village and preyed on the villagers' sheep.

The real intention of 'peeing upside down' is a scent marker

The giant panda 'peeing upside down' was photographed, and many people wondered why it did it this way What about urination? In fact, what we see is only the appearance. In fact, the real intention of the giant panda's "upside-down peeing" is the smell mark. Most animals have a certain sense of territory, that is, they have their own sphere of influence. So how do you define your territory? Most of the animals adopt the method of odor marking, that is, marking with odorous substances everywhere in their territory. These odorous substances are mostly urine, feces, saliva, and odorous substances secreted by specific glands. For example, the anal glands of small civet cats will secrete a yellow odorous substance that can be used to defend against enemies. Can also be used for scent marking. Giant pandas also have a strong sense of territory. Even in the zoo, two giant pandas may fight because one of them occupies a good territory. In addition, odor markers are particularly important for communication among giant panda populations. Pandas have expressionless faces, short tails, no crests or manes to spread out, and inflexible ears, so using visual signals to convey information is almost impossible. Because of the limited transmission range of sound signals and the significant limitations of time and frequency, it is the most economical and applicable to use smell to communicate. After they have scent-marked somewhere, another panda may still be able to smell it a few days later. Especially during the estrus period, it is very important for giant pandas to use scent to transmit information.

Takin and wild boar "do evil" to giant pandas

In the habitat of giant pandas, there are many wild animals, including takin and wild boar, It has a great influence on the scent marking of giant pandas. The takin is a large ungulate with a rather peculiar shape, resembling both a cow and a sheep. They are aggressive by nature, especially bulls. In order to give themselves an advantage in the fight, they are used to rubbing their horns with big trees on weekdays to make them smooth and sharp. Although wild boars do not have horns to polish, they are also used to grinding trees with their bodies. This habit of them will rub off the smell left by the giant panda. In addition, many large trees in the forest will be damaged, causing insect pests, cutting off a large number of trees, increasing the number of fallen trees in the forest, and transforming the habitat in a direction that giant pandas do not like. In the Qinling Bald Mountain area, there are a lot of fallen trees in the forest, which are basically the "masterpieces" of takins and wild boars. The scent marks left by giant pandas will be rubbed off by takins and wild boars, which may cause giant panda populations in the same habitat to not communicate well, thus affecting their population development. As we all know, giant pandas are a difficult animal to reproduce, and these habits of takins may even make them even more difficult. Follow me and make a friend who understands animals.

(责任编辑：Bird)

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