CATDOLL : CATDOLL: My Story with the Museum is the Natural History Museum. Thank you~

"My Story with the Museum" is the Natural History Museum. Thank you~

Whenever I walk past the gate of the former site of Inner Mongolia Museum, I always feel deeply nostalgic. I can't help but look at it a few more times. The galloping horse on the roof seems to be neglected. It has witnessed the story between me and the museum.

When I was very young, my parents often took me to the Inner Mongolia Museum. In my ignorant memory, it was like a treasure house. It was not until I was in the third grade of elementary school that I had a preliminary understanding of the strange and bizarre cultural relics here. Once, my classmates and I came here to watch a puppet show. Seeing the uncles and aunts perform vividly, I admired them very much. After watching the puppet show, there were little guides who volunteered to explain to us. After listening to the explanation, I fell in love with this place. From then on, I hoped that I could become a little guide. So, I signed up and participated in relevant training. After a period of hard work and the teacher's careful guidance, I finally understood the Mongolian History Exhibition Hall and was able to explain it to everyone fluently.

In the following days, I was always in the museum during holidays. I built yurts with the teachers, spun yarn and rolled felt, learned to walk on stilts, performed puppet shows, and participated in happy classes. I was very happy. I won the championship in the young tour guide competition in February this year. I benefited a lot from the care and training of the teachers in the museum. I not only learned about the national folk culture and history, but also learned to make contributions. As a little volunteer, I am willing to explain the culture and history of Inner Mongolia to tourists.

On May 3rd, our whole family came to the Inner Mongolia Museum to take a group photo, and also took photos with the teachers here. This is because the museum and the museum have been merged.

When I walked to the door of the museum again, my reluctance to leave had turned into deep gratitude, gratitude that the museum had brought me the wonderful childhood times and eternal memories.

Has anyone seen the river pig?

Finless Porpoise Latin name: Neophocaena phocaenoides English name: finless porpoise Chinese alias: river pig, river pig Classification: Mammalia, Phocoenidae, Finless Porpoise Body length: 120-190 cm Weight: 100-220 kg Appearance: The whole body of the finless porpoise is lead gray or grayish white. The head is blunt and round, and the forehead bulges slightly forward; the head of the finless porpoise is shorter, nearly round, the forehead protrudes slightly forward, the snout is short and wide, the upper and lower jaws are almost the same length, and the snout is shorter and wider. The teeth are short and flat on the left and right sides and are shovel-shaped. The eyes are small and not very obvious. The first five cervical vertebrae are fused, and the ribs are usually 14 pairs. The middle part of the body is the thickest, and the cross section is nearly circular. There is no dorsal fin on the back, and the flippers are large, triangular, and pointed at the end. The length is about one-sixth of the body length. It has 5 fingers. The tail fin is large, divided into two lobes, and is horizontal. The horizontal width of the two tail lobes is about one-fourth of the body length. There is a more obvious raised fin on the back of the tail fin. There is a 3-4 cm wide skin bulge where the dorsal fin should be, and there are many keratin scales. The whole body is blue-gray or tile-gray, the abdomen is light and bright, the lips and throat are yellow-gray, and there are some irregular gray spots on the abdomen. The color between the base of the two flippers on the ventral side and the anus of some individuals becomes lighter, and some are even light red, especially during the breeding season. Peculiarity: There is only one species in the genus finless porpoise. The main feature is that there is no dorsal fin. There is an inconspicuous bulge between the front two-fifths of the back and the tail fin. There is scaly skin on the bulge. The whole body is light blue-gray, which is different from the genus porpoise. Living environment: Finless porpoises usually live in the sea where salt and fresh water meet, and can also live in fresh water such as the downstream areas of large and small rivers. Protection level: National second-class protected animal The history of the finless porpoise is as early as the Miocene epoch more than 20 million years ago. Their close relatives lived and reproduced in the Yangtze River. In his book "Shuowen Jiezi", Xu Shen (58-148 AD) of the Eastern Han Dynasty, there is a record that "the finless porpoise (i.e. the Yangtze River porpoise) comes out of Jiujiang and has two breasts". my country's scientific research on the "living fossil" finless porpoise began in the 1990s. Driven by the call of relevant Chinese and foreign scholars and experts, my country's first Yangtze River finless porpoise reserve, Tongling Freshwater Dolphin Nature Reserve, was built in Tongling, Anhui and put into research work. Over the past decade, researchers at the Tongling Freshwater Dolphin Nature Reserve have conducted a series of scientific research on the capture, breeding, reproduction and habitat protection of finless porpoises, and achieved good results. Recently, with the approval of the State Council, the reserve has been upgraded to a national nature reserve. Distribution: The western Pacific Ocean, the Indian Ocean, the Sea of ​​Japan and the coastal areas of my country are tropical to warm temperate waters. In my country, it is found in the Bohai Sea, the Yellow Sea, the East China Sea, the South China Sea and the Yangtze River. In the Yangtze River, it can even be traced back to Yichang and Dongting Lake. In the Amazon River basin, there is a close relative called the pufferfish. Species status: There are still many in the wild, and it is quite common. Living habits: The finless porpoise likes to move alone, and sometimes forms a small group of 2-3. But there are also records of 87 together. The finless porpoise has a wide diet, mainly fish, but also non-fish, such as shrimp and cephalopods. The finless porpoise can emit two major types of sound signals. The high-frequency pulse signal is composed of a series of single high-frequency narrow pulses, generally between 20 and 120, which is a sonar signal or echolocation signal, mainly emitted when detecting the environment and hunting; the low-frequency continuous signal is a time-continuous signal. Due to the different frequencies, some sound like sheep and some sound like birds. It is basically not gregarious with the white-fin dolphin, but they occasionally play together. The finless porpoise can adapt to a wide range of water temperatures and can live normally from 4 to 20 degrees Celsius. It has a lively temperament and often swims up and down in the water, rolling, jumping, nodding, spraying water, and turning suddenly. When swimming sideways, one blade of the tail fin is exposed above the water surface, swaying left and right, and passing through the air. When frightened, it swims rapidly, and then lifts its body into the air once or several times in a row, with most of the body exposed above the water surface, and only the tail blade slides forward in the water. Occasionally, the whole body jumps out of the water, reaching a height of 0.5 meters. When swimming upright, two-thirds of the body is exposed above the water surface, and it maintains a vertical posture with the water surface, which can last for several seconds. Whenever there is a large ship sailing in the river, the finless porpoise likes to follow closely behind it and ride the waves. It also has an interesting water-spitting behavior, exposing its head above the water surface, while swimming forward quickly, opening and closing its mouth, and spraying water from its mouth from time to time, sometimes spraying water 60 to 70 centimeters away. When breathing, only the head is exposed, and the tail fin is hidden underwater, and then it dives underwater in a bouncing manner. The breathing interval is generally about 1 minute, but if it is frightened, the diving time can reach 8 to 9 minutes. Generally, if you don't bend your waist when entering the water, you won't stay underwater for a long time. But if you bend your waist a lot when diving, it means you will dive deep and won't come out of the water continuously. When swimming downstream, the next water exit is generally about 10 meters ahead of the previous water exit. When swimming along the current, it is generally about 5 meters ahead of the previous water exit. When swimming upstream, it can only move forward about 3 meters. If strong winds are about to occur, the breathing rate of the finless porpoise will increase, it will be exposed very high above the water surface, and its head will mostly face the direction of the wind to "go against the wind" when it comes out of the water. Fishermen working on the Yangtze River call this behavior of it "worshiping the wind." This may be because the air pressure is low before the weather changes, so it has to increase its breathing rate to get enough oxygen. Its food includes fish such as blue-scaled fish, jade tendon fish, eel, perch, anchovy, big silver fish, shrimp, squid, etc., which changes with the environment. When foraging, it first swims quickly, mostly dives deep, frequently emerges from the water, and breathes loudly. Sometimes there is dirt on its mouth, which stirs up waves tens of centimeters high on the water surface. After finding the prey, it will rush forward, then quickly turn around, use its tail blade to hit the water and stir the water, drive away the fish, and scare them away. Then it will swim quickly, quickly approach the prey, and flexibly turn and swing its head to accurately locate it. After biting the prey, it will adjust the fish head to face the throat and swallow it quickly, and then go for the next prey. Sometimes it will hold several smaller fish in its mouth and swallow them again. After eating, it will swim slowly or float in the water. If a group finds a school of fish, they will coordinate their actions and swim separately from each other. They will not dive deep and swim in an uncertain direction, often accompanied by forward pounces and tossing heads, to surround the prey. The dozens to hundreds of silvery-white fish being chased are forced to jump out of the water, making the water surface silvery and shining, which is a spectacular scene. While the finless porpoise is hunting, the gulls circling in the air will come in time, and take advantage of the small fish to emerge from the water and keep flying across the water to grab the small fish. Physiological characteristics: The mating of finless porpoises usually takes 30 to 60 minutes, from the passionate pursuit between male and female to the end of mating. It can happen more than ten times a day, and it can happen day and night. When chasing the female, the male swims back and forth with his abdomen and tail peduncle, and has various postures such as rolling, swimming sideways, and swimming on his back. The water surface is often stirred up with waves and splashes. When swimming together, the male and female emerge from the water or dive into the water in parallel, and different parts of their bodies touch and rub against each other. Sometimes they touch each other with the tip of their kisses, kiss each other's reproductive parts, etc., gradually triggering mating. When the estrus reaches a certain degree, they face each other with their ventral surfaces, close their reproductive fissures, and the male exposes his genitals. They continue to swim together until the male's genitals are inserted into the female's vagina to achieve mating. At this time, the water surface is relatively calm, and mating ends after about 2 minutes. The male and female slowly float up from the water and then separate. About 10 days before giving birth, the female's breathing rate increases day by day and her food intake decreases gradually. Five days before delivery, the breast cleft and genital cleft gradually swell and open, and the nipple protrudes. When swimming, the female often stops at the water surface, and the body sways from side to side, as if losing balance. About 25 hours before delivery, the vulva opens further, and milky white liquid flows out of the vaginal opening. During delivery, the vaginal opening forks, and the female swims up and down quickly and rolls every 3 minutes or so, and swims slowly after about 2 to 3 minutes, and then swims quickly again after a 3-minute break. Every time she swims quickly, the female begins to exert force, so that the baby can be born a little, but when she relaxes, the baby shrinks back again. It is not until after a break that the female suddenly and continuously exerts force to deliver the fetus as a whole. The baby immediately swims upward with all her strength, and the female swims with her belly facing up in the opposite direction of the baby, breaking the umbilical cord. The baby rushes out of the water and breathes air. The entire delivery process takes about 160 minutes. Female finless porpoises give birth in October every year, with one baby per litter. The female has obvious behaviors of protecting and helping the cubs, which are manifested in carrying and carrying, which is very interesting. When carrying, the cub's head, neck and abdomen are closely attached to the female's back and lie obliquely. When breathing, the cub and the female emerge from the water one after another. When the cub grows up, the female often uses flippers or tail leaves to support the cub's lower jaw or other parts of the body to swim, and they also emerge from the water one after another when breathing. The carrying method is more common. The female and the cub are very close, about 5 to 10 meters apart, but their bodies are not touching, and they also emerge from the water one after another. When breastfeeding, the female and the cub often appear in shallow and slow water areas. The female body slightly tilts to one side, exposing one side of the flippers, and the cub is close to the female's abdomen. Each breastfeeding lasts about 5 to 10 minutes. Sometimes the male also participates in raising the cub, letting the cub swim between the male and female, but generally closer to the female. The "family" sinks and floats in the water at the same time, and emerges from the water almost in parallel. Female finless porpoises have a very strong maternal instinct. If their young are unfortunately captured, they often cannot bear to abandon them, so they are often captured at the same time.