Primates make laughter when they play. However, laughter in animals often means an invitation to mate, join a herd, or find food. The meaning of animal laughter Laughing together helps people connect and bond. Although the reason for laughing can vary widely between individuals and groups, this sound can still be distinguished from crying, screaming, groaning or shouting. In humans, laughter expresses a wide range of emotions, from positive such as amusement to negative such as annoyance. People laugh when they hear an interesting story or when they see funny things. But what about animals? Do they laugh and is the reason they laugh the same way humans laugh? It’s hard to tell if animals have a sense of humor like humans. A study published in the journal Bioacoustics in April 2021 found that when communicating, animals sometimes make sounds that have a comforting, pleasant nuance. Sasha Winkler, lead author of the study, at the University of California, Los Angeles (USA), said that rhesus monkeys (scientific name Macaca mulatta) often pant when playing. This is the inspiration for her and her colleagues to expand their research on animal laughter. They looked to see if other animals let out gasps like rhesus monkeys during play. The researchers say that such sounds closely resemble human laughter. They continued to study the prevalence of laughter among animals. The team identified 65 species that “laughed” while playing, most of which were mammals. Some birds also make cheerful sounds. This analysis helps scientists go back to the evolutionary origins of laughter in humans. When playing, animals may cry or laugh to keep interactions at a harmonious level, not becoming aggressive. Unlike fighting, the concept of play in animals is often mating, foraging. Play can be clearly seen in primates because their facial muscles show human-like expressions when playing. The study grew out of an experiment from 2017 on kea parrots living in New Zealand. Experts recorded the laughter of the kea parrots and played them back for others to hear. As a result, these parrots will play together relatively closely. This study shows that the laughter of kea parrots is like an invitation to others to join the flock or to feed together. Investigation results show that mammals, especially primates, rodents, carnivores and cetaceans emit similar sounds. These sounds are only emitted when playing, such as the whistle like the whistle of a bottlenose dolphin (scientific name is Tursiops truncatus), the hiss of a mouse. Most primates, including chimpanzees, gorillas, monkeys, and baboons, exhibit laughter by: panting, smirking, chuckling to “click, clack” and loud cries. . Birds emit laughter to attract their fellow humans. Laughing is not just for fun Research also shows that fish, amphibians and reptiles do not produce laughter because this group may not organize play activities. However, laughter between humans and animals is quite different. Usually, people’s laughter shows that they are having fun or sharing their joy with those around them. People also put laughter into communication to express their attitudes and feelings towards the behavior of people around them. For example, smirking, sarcastic laughter, sarcastic laughter to express a reaction of praise or disapproval of the actions of people around. But in some animals, laughing is not synonymous with cheerfulness. For example, hyenas often laugh when feeling dangerous, threatened, attacked or simply upset. Human and animal laughter also differ in volume. For example, older hyenas often laugh at a low pitch while young hyenas’ laughter is high, even shrill. Some species laugh very softly, just enough for the other person to hear. While human laughter is loud, loud and nuanced. Before Winkler, in 2000, Jaak Panskeep, a psychologist and neuroscientist working at Washington State University, USA, discovered that tickled rats emit chirping sounds similar to the sounds they make when they play. Some lab rats liked to be tickled so much that they simulated this amusing activity. From there, Panskeep and his colleagues began to seriously study the play of animals. He identified seven basic emotional expressions activated by the mammalian brain. Since then, he has applied this result to the study of human emotions and found a treatment for depression in humans. Panskeep has clinically developed an antidepressant, named GLYX-13. He considers this modulation product to be proof that scientists should seriously evaluate the emotional state of animals. Animal studies could pave the way for the development of psychopharmaceuticals for humans. He also added that we think rats and monkeys can laugh because they are smart. But in fact, intelligence is not a funny factor. Play in any animal can stimulate laughter, increase cognitive ability.

Primate’s “Kingdom” Phong Nha – Ke Bang National Park in Quang Binh is known the world over with the title “Kingdom of Caves” because there are hundreds of caves with fanciful beauty and hidden mysteries and surprises. is discovered. Not only that, this place is also known as “Primate Paradise” because it has the highest number of primate species and density in Vietnam. Notably, the whole Vietnam has 24 primate subspecies, here there are 10 species and subspecies living, lasting with time and is identified as the place with the highest diversity of primates in the National Parks. In which, there are 3 globally endangered primate species: the white-necked langur, the brown-shanked douc langur and the white-cheeked gibbon. When coming to any limestone mountains in Phong Nha – Ke Bang, many people are surprised because if they can’t meet monkeys, it is easy to admire the splendid beauty of the brown-shanked douc, or heard the sacred song calling the herd of siki gibbons. The forests: Hung Dang, Hung Lau, Tro Mong… are frequent spots of brown-shanked douc and white-necked langurs. While the white-necked langur often occurs in the Tro Mong area, many people have found that the brown-shanked douc is abundant in Hung Dang. Mr. Le Thuc Dinh, Director of the Center for Rescue – Conservation and Biological Development of Phong Nha – Ke Bang National Park, said that every day when “surveying” or patrolling, officials in the National Park easily encounter douc paws. brown with the number of about 3 herds, each group about 15 individuals. The brown-shanked douc with its brightly colored fur, is considered by the World Wide Fund for Nature (WWF) as the “queen” in the primate world. Meanwhile, in the U Bo forest area, located on the West branch of Ho Chi Minh Road, is the largest population of siki gibbons (local people call it song gibbons) in Vietnam. Here, scientists and rangers recorded about 41 herds of siki with hundreds of individuals. According to Mr. Dinh, in this National Park, there are many primate species belonging to rare goods, such as: loris family, there are large loris, small loris; monkey family, there are pig-tailed monkeys, moldy monkeys, yellow monkeys, red-faced monkeys, jet-black langurs, white-necked langurs, brown-shanked douc langurs; and the gibbon family has the white-cheeked gibbon… According to research documents with unspecified statistics, the white-necked langur alone is estimated to have about 700 individuals; brown-shanked douc, estimated at over 500 individuals. White-necked langur in the area of ​​​​Doi mountain in Phong Nha – Ke Bang National Park Primates are being cared for, rescued and conserved in Phong Nha – Ke Bang National Park The place to save primates With the rarity, especially there are rumors about the miraculous value of monkeys and apes, so primates in Phong Nha – Ke Bang National Park always face a great threat from hunting and trafficking. The illegal sale of wild animals makes the officials and experts working here very hard in the work of protection, conservation and prevention. Center for Rescue, Conservation and Biological Development of Phong Nha – Ke Bang National Park, where many officials are working every day to rescue and nurture dozens of precious and rare primates in danger of extinction, like : brown-shanked douc langur, red-eyed monkey, white-cheeked gibbon… The center is located on the banks of the Son River, where it has a mild climate and an abundant food source for rescued primates. Busy preparing lunch for a red-faced monkey, Pham Kim Vuong – Head of the Wildlife Rescue Department, said that this monkey was very pitiful, previously being hunted by a group of people into the forest. Thanks to the forest ranger’s discovery, this monkey was saved. However, his spirit was panicking, his body was injured due to being entangled in an animal trap, fortunately thanks to the careful care of the brothers in the rescue department, his health is now stable and ready to return to the natural environment. Veterinarian Le Ngoc Anh, deputy director of this center, said that wildlife rescue activities have been carried out since its establishment in 2001. However, the rescue infrastructure is still very poor at this time. temporary, there is no animal rescue area, so the rescue only focuses on a few endangered species. From 2015 to now, the unit has received nearly 600 wild animals; The rescue success rate is nearly 90%. Currently, the center is continuing to nurture and rescue dozens of wild animals. “The care is not simple, it’s hard work, sometimes in the face of danger,” said veterinarian Le Ngoc Anh. Develop a conservation strategy lược Mr. Pham Hong Thai, Director of Phong Nha – Ke Bang National Park Management Board, said that the unit has developed action programs on wildlife protection and conservation; endangered, precious and rare forest fauna and flora to meet the requirements of conservation according to the actual situation. From 2015 to now, people have been propagated to be more conscious and responsible in handing over wild animals for conservation, including rare primates: pig-tailed macaques, golden monkeys, monkeys Coc, small loris, border mountain turtle, Ha Tinh langur… In addition, in order to contribute to the good implementation of wildlife conservation, the National Park has also signed a regulation on coordination with the provincial border guards, forest rangers and authorities of 7 buffer zone communes to prevent the transportation of forest products. illegal; Sign a commitment not to violate regulations on forest protection, not to trade, trade or consume wild animals for households, restaurants in the buffer zone communes and mining and trading units. travel…

Coming to Tam Coc in May, visitors will see the most beautiful “golden color” of the year in the most beautiful rice fields in Vietnam. (Photo: Minh Duc / VNA) The beauty of Ninh Binh city at night. (Photo: Minh Duc / VNA) Tam Coc is beautiful and dreamy, the rice harvest season. (Photo: Minh Duc / VNA) Birds of Thung Nham Bird Park. (Photo: Minh Duc / VNA) Bears are stocked in a semi-wild environment at Ninh Binh bear conservation center, which attracts many visitors. (Photo: Minh Duc / VNA) A precious primate at the Cuc Phuong Endangered Primate Rescue Center. (Photo: Minh Duc / VNA) A precious primate at the Cuc Phuong Endangered Primate Rescue Center. (Photo: Minh Duc / VNA) Panoramic city of Ninh Binh. (Photo: Minh Duc / VNA) Thung Nham Bird Park attracts many domestic and foreign tourists to visit. Thung Nham Bird Park (Thung Chim) is located in Ninh Hai commune, Hoa Lu district, where there are nearly 40 species of birds with about 50,000 inhabitants. (Photo: Minh Duc / VNA) Tourists visit Bich Dong pagoda. (Photo: Minh Duc / VNA) Tourists visit Trinh Temple in the scenic complex of Trang An. (Photo: Minh Duc / VNA) The ancient half-moon lake is located in Thien Ton Pagoda (the historical and cultural site of Hoa Lu ancient capital). (Photo: Minh Duc / VNA) The ancient pagoda at the foot of the mountain has Non Nuoc pagoda (the old name is Duc Thuy Son). (Photo: Minh Duc / VNA) Trang An eco-tourism area (Ninh Binh) with the beauty of nature, each season brings its own beauty and imprint. When winter comes, the white reed fields bloom, adding wild and poetic colors, captivating visitors from all over the world. (Photo: Minh Duc / VNA) Visitors enjoy the beauty of Van Long lagoon on clear blue water and have many opportunities to see many rare birds during the migration season. Dam Van Long, Gia Vien district (Ninh Binh) is the largest wetland nature reserve in the Northern Delta. For a long time, this place has become a nature reserve, recorded in the list of special-use forests in Vietnam. (Photo: Minh Duc / VNA) Bai Dinh Pagoda in Trang An Ecotourism Area, is a large temple complex with an area of ​​539 hectares, including areas such as Cultural Park and Buddhist Institute, reception area and landscape park, road traffic, Dam Thi lake area, discharge lake and many constructions are still under construction. (Photo: Minh Duc / VNA) Tam Coc’s beauty in the season of ripe rice. (Photo: Minh Duc / VNA) Bai Dinh Pagoda in Trang An Ecotourism Area, is a large temple complex with an area of ​​539ha, including areas such as Cultural Park and Buddhist Academy, reception area and landscape park, intersection pine, Dam Thi lake area, discharge lake and many works are still under construction. (Photo: Minh Duc / VNA) Ca Cave with magical beauty at Van Long Nature Reserve. (Photo: Minh Duc / VNA) Van Long was originally known as “no waves” because of the smooth, smooth water flow like a large mirror in the sky. The lake is clear, radiating greenness of the layers of moss on the bottom floor. (Photo: Minh Duc / VNA) Temple of King Dinh Tien Hoang, where many cultural, historical, artistic, and spiritual values ​​are kept. (Photo: Minh Duc / VNA) Storks on golden rice fields. (Photo: Minh Duc / VNA) The yellow Ngo Dong line welcomes domestic and foreign tourists to visit Tam Coc – Bich Dong. (Photo: Minh Duc / VNA) Trang An boat station. (Photo: Minh Duc / VNA) The yellow Ngo Dong line welcomes domestic and foreign tourists to visit Tam Coc – Bich Dong. (Photo: Minh Duc / VNA)

Now, the wild mountain gorilla (Gorilla beringei beringei) in Rwanda’s Volcanoes National Park has “confessed” to the scientists secretly beating their breasts. The research has been published in the journal Scientific Reports under Nature and led by Dr. Edward Wright of the Max Planck Institute of Evolutionary Anthropology in Germany. The mountain gorilla (Gorilla beringei beringei) is one of two eastern gorilla subspecies, comprising two populations. A population found in the Virunga volcano in Central Africa belongs to three national parks: Mgahinga, in southwestern Uganda; Volcanoes, in northwestern Rwanda; and Virunga in the eastern Democratic Republic of the Congo. The remainder was found in Bwindi Prohibited National Park in Uganda. Some primateists consider the Bwindi population a separate subspecies, although no complete description has been made. As of November 2012, an estimated total population of mountain gorillas was 880 individuals. From January 2014 to July 2016, researchers observed 25 wild male silver-backed gorillas overseen by the Dian Fossey Gorilla Fund International (Dian Fossey Gorilla Fund International), and recorded more. 500 chest beats. They recorded the chest pounding sounds of six of the gorillas, measured the rhythm and duration of each gorilla’s chest beat, and the frequency of the chest beating sounds. At the same time, they used the photographs to measure the shoulder widths of these gorillas to determine the sizes of different gorillas. Mountain gorilla. Mountain gorillas are descendants of monkeys and ancient apes found in Africa and Arab in the early Oligocene (34-24 million years ago). The fossil where the mountain gorilla lives is poor and its evolutionary history is unclear. About 9 million years ago, a group of primates evolved into gorillas, separated from their common ancestors with humans and chimpanzees; This is when genus Gorilla comes in. The mountain gorilla split from the eastern delta gorilla about 400,000 years ago and the two subspecies split from the eastern gorilla about 2 million years ago. There is much unresolved debate about the classification of mountain gorillas. The genus Gorilla was originally named Troglodytes in 1847, then renamed as it is today in 1852. By 1967 taxonomist Colin Groves proposed that all Gorilla genus consisted of only one species (Gorilla gorilla) with three Subspecies Gorilla gorilla gorilla (western plains gorilla), Gorilla gorilla graueri (delta gorilla found in western Virungas) and Gorilla gorilla beringei (mountain gorilla). In 2003, after review, gorillas were divided into two species (Gorilla gorilla and Gorilla beringei) by the International Union for Conservation of Nature (IUCN). After analyzing these measurement data, they found that “mountain gorillas can reliably transmit body shape information by beating their chest”. Specifically, large males will emit a lower frequency sound when they strike the chest. Researchers speculate that this may be related to their body’s large resonance cavity. Researchers also found that males beat their breasts more often during oestrus in female gorillas, so the sound of the chest beats could be an important body manifestation during flirting, a on the one hand, attracting children, and on the other hand, frightening the opponents. Interestingly, the beats and timing of these gorillas have nothing to do with body size, and not that the larger the size, the longer the beat. The chest beat of each gorilla is like a behavior showing the different personality, duration and frequency that will carry the characteristics of each individual. Researchers have analyzed that personalized beats could allow other gorillas to distinguish who was beating their chest from them. Mountain gorillas have been reported to have led to a threat of extinction due to poaching – mountain gorillas are often permanently injured by traps. hunt wild animals or take young individuals to zoos. Occupation – the rapid expansion of people’s settlements around the park’s safety corridor. Disease – mountain gorillas are regularly in contact with tour groups from all over the world, they can completely infect human infections. War, political turmoil – refugees flock to mountainous areas, cut trees and hunt gorillas for their meat for temporary life. Because of the above reasons, the World Animal Protection Organization and the host country authorities have increased patrols, using armed soldiers to remove traps, in addition to the work of determining the number of Gorillas mountain remaining. Expand the area of ​​the national park, require tour groups to stand away from monkeys, better manage this type of ecotourism. Another important part is educating local communities, spreading propaganda through materials and books and teaching students about biodiversity and protecting endangered animals. Ultimately, the scientists concluded that mountain gorillas live in dense rainforests, and sometimes they cannot see each other even when very close, but throbbing conveys personal information. it’s important for them to communicate.

Big, weird monster in Fouke In Arkansas, it has been unknown since a story of a huge beast in the form of a human but its body covered with feathers. People around the area call it the servant that governing the green forest, full of power. Because of that heavy responsibility that this creature is extremely ferocious, it is ready to destroy anyone who dares to invade where it lives. These ideas are just a funny story, but it has come true since the 30s of the last century. One night in 1932, people in the city of Fouke, Arkanas suddenly heard the cry of the cattle in their ranch. Immediately, the rancher rushed out, in the dark, he spotted a fluffy animal biting on a sheep’s neck. Seeing that, the beast quickly ran out of the farm. In 1946, while walking near the outskirts of the town of Fouke, a woman saw a strange creature crossing the street quickly. She recounted: “It walks on two legs, has a large appearance, a hairy body …”. In 1955, local newspaper Victoria Advocate published an interview with a hunter in the area. He describes a special encounter with a bear-like creature, but goes straight and very agile. He hit a few shots, but the animal was still strong enough to flee deep into the forest. In the book The Apes Among Us Also noted the appearance of this creature through the narrative of a boy. During a walk, the boy saw a naked creature, hairy body, tall, with very long arms drinking water in the lake. The animal is very shy, when he saw the human, he ran away. These reports are only a handful of many human encounters with monsters since 1930, yet most witnesses only see the animal at a distance, or in the dark. Therefore, the police ignored these reports and said that this was just a scam of a few individuals who wanted to be famous. However, in 1971, the police had to change attitudes about the humanoid monster in the town of Fouke. Real encounters On the night of May 1, 1971, a young couple named Bobby and Elizabeth Ford phoned the police to report a strange creature rushing into the house and attacked. The wife panicked and told the police, at first they thought that the strange animal was just a bear looking for food outside the garden. But no, a monkey-like creature the size of a bear crashed into the house, lifted Bobby up high, and threw it against the wall. Fortunately at that time, there was Bobby’s brother Don, he quickly grabbed the gun and shot the animal. Although it didn’t hit, but the sound from the gun frightened the animal, it quickly escaped into the night. At the scene, the police collected countless traces to corroborate the above story. Furniture in the house was disturbed as if a fierce battle had just happened, scratches appeared on the wall. On the garden ground were very large footprints, feet only three toes, and a little fur. The most obvious evidence is Bobby, a healthy young man, but hospitalized because of the severe injury on his back. From here, most people can imagine how frightening they would have to face. The creature was discovered again on May 23, 1971. At that time, DC Woods, Jr, Wilma Woods, RH Sedgass were walking on the highway, near the town of Fouke. They suddenly saw a large monkey running quickly past the front of the car, too curious, the three stopped and ran into the woods. However, they did not catch up, but found only three-toed footprints on the ground. In the months that followed, local residents and tourists discovered more traces of the monster. The most famous trace was found in a pea field owned by a resident named Scott Keith, and those are still the giant three-toed footprints. From here, the mystery of this creature creates a bustling atmosphere in the town of Fouke. Immediately after the news about it was transmitted, countless curious people flocked here to explore and learn. Regional radio also offers generous bonuses for those who take pictures of this strange creature. However, all photos sent through the inspection are counterfeit. Witnesses saw the animal more and more, but by 1986, the mayor of Fouke City Virgil Roberts and former sheriff Leslie Greer declared that the Fouke was completely fake. Even so, every year, reports about the monster Fouke are still being regularly recorded. Even many websites reported about this creature, witnesses and curious people discussed passionately. The views of scientists The people of Fouke town all believe the animal is real, but scientists are always skeptical about it. They argue that physical evidence such as footprints and claw marks are easy to create and do not prove much. If it was said that the Fouke monster was humanoid, it must be a relative of the primate. But here, the witness described the Fouke monster with only three toes, far different from today’s primates – five toes feet. Many scientists have denied the existence of Fouke and this is just a scam. Besides, there are still a handful of scientists who believe that the monster Fouke is real. It is the descendant of Gigantopithecus – giant ape in China, India, existed from 5 million years – 100,000 years ago. The fossils indicate that Gigantopithecus are the largest primates in history. Most likely, the Fouke monster is a Gigantopithecus left on Earth and in need of human protection.

Chest patting is a means of communication However, recently a new study has revealed that gorilla clapping behavior is not quite as we know it. Research published in the journal Scientific Reports concluded that gorilla clapping was in fact a means of non-verbal communication that “encoded” their competitiveness instead of boasting of strength. The gorilla clapping itself represents an interesting kind of communication unlike a human. It is not really a voice but an act of inclination to show off visible and audible physical strength. To draw conclusions, the researchers sought to record the sound of the chest beating using photometry. With this method, scientists do not need to get close to the gorilla because the extremely powerful male monkeys pose many dangers in Volcanoes National Park, Rwanda. However, even using photometry, scientists still need to be in the right place and at the right time to catch chest beats from gorillas. The results showed that sounds had lower frequencies in large male mountain gorillas, while younger males had higher frequency sounds. Where low-frequency sounds travel further than high-frequency sounds, which means that larger males can be more formidable competitors. This is useful for males of similar or smaller size who can use the information to decide if it is worthwhile against the competitor or to step back. In previous research conducted by the same group of researchers found that the larger male mountain gorillas not only were socially dominant, they were also more likely to reproduce successfully than the offspring. the male is smaller. With female monkeys, they will also collect information from the male monkey’s chest pounding sound to decide on a worthy mate. “The gorilla’s chest banging is one of the iconic sounds of the animal kingdom, so it’s great that we can prove that gorilla’s body size has been encoded in the displays. This spectacular performance, “said Edward Wright, author of the study from the Planck Institute of Evolutionary Anthropology. Critically endangered species on the Red List Gorilla is a genus of primates belonging to the family of humans, herbivores living in the jungles of Africa, the largest of the extant primates. Gorillas are divided into two species (there can be 4 to 5 more subspecies). The DNA of the gorilla is the same as that of humans 98% -99%. They are very closely related to humans after only 2 species of chimpanzees. This primate has a massive body. Gorillas are 1.7–2 m tall when standing upright and weigh 180–200 kg. These animals usually walk on all fours, although they can stand on two legs. Gorilla lives in the tropical and subtropical forests of Africa. Gorillas move with their knuckles, although they can sometimes stand upright with food or on defense. Wild adult gorillas weigh 135 to 180 kg (298 to 397 lb) while females are usually half as much as 68–113 kg (150–249 lb) males. Adult males are 1.7 to 1.8 m (5.6 to 5.9 ft) tall, with an arm span of 2.3 to 2.6 m (7.5 to 8.5 ft). Females have a shorter arm span. The adult male gorilla is known as the “silver back” due to the silver hair on its back. Occasionally, a silverback greater than 1.8 meters and 230 kg is recorded in the wild. The obese gorilla in captivity 270 kg. Gorillas live in groups under the command of the strongest and most powerful male. It is the male’s duty to lead and protect the whole herd from being attacked by wild animals. The gorilla’s most dangerous enemy is the very ferocious leopard. When threatened, the male will stand upright and pound his stomach with two hands to warn him before fighting. The gorilla is known as a powerful beast with a large appearance, much stronger than a human, powerful and intelligent hands and a gorilla punch that can make everything facing a deformation. . Despite its massive and massive body, Gorilla has an average running speed of about 40 km / h. All species (and subspecies) of the gorilla are listed as Critically Endangered on the IUCN Red List. Now, more than 100,000 western lowland gorillas are thought to exist in the wild, with 4,000 in zoos; The eastern lowland gorilla has a population of less than 5,000 in the wild and 24 in the zoo. The mountain gorilla is the most endangered species, with an estimated population of 880 remaining in the wild and no species in the zoo.

Now, the wild mountain gorilla (Gorilla beringei beringei) in Rwanda’s Volcanoes National Park has “confessed” to the scientists secretly beating their breasts.

The research has been published in the journal Scientific Reports under Nature and led by Dr. Edward Wright of the Max Planck Institute of Evolutionary Anthropology in Germany.

The mountain gorilla (Gorilla beringei beringei) is one of two eastern gorilla subspecies, comprising two populations. A population found in the Virunga volcano in Central Africa belongs to three national parks: Mgahinga, in southwestern Uganda; Volcanoes, in northwestern Rwanda; and Virunga in the eastern Democratic Republic of the Congo. The remainder was found in Bwindi Prohibited National Park in Uganda. Some primateists consider the Bwindi population a separate subspecies, although no complete description has been made. As of November 2012, an estimated total population of mountain gorillas was 880 individuals.

From January 2014 to July 2016, researchers observed 25 wild male silver-backed gorillas overseen by the Dian Fossey Gorilla Fund International (Dian Fossey Gorilla Fund International), and recorded more. 500 chest beats.

They recorded the chest beating sounds of six of the gorillas, measured the rhythm and duration of each gorilla’s chest beat, and the frequency of the chest beating sounds. At the same time, they used the photographs to measure the shoulder widths of these gorillas to determine the sizes of different gorillas.

Mountain gorillas are descendants of monkeys and ancient apes found in Africa and Arab in the early Oligocene (34-24 million years ago). The fossil where the mountain gorilla lives is poor and its evolutionary history is unclear. About 9 million years ago, a group of primates evolved into gorillas, separated from their common ancestors with humans and chimpanzees; This is when genus Gorilla comes in. The mountain gorilla split from the eastern delta gorilla about 400,000 years ago and the two subspecies split from the eastern gorilla about 2 million years ago. There is much unresolved debate about the classification of mountain gorillas. The genus Gorilla was originally named Troglodytes in 1847, then renamed as it is today in 1852. By 1967 taxonomist Colin Groves proposed that all Gorilla genus consisted of only one species (Gorilla gorilla) with three Subspecies Gorilla gorilla gorilla (western plains gorilla), Gorilla gorilla graueri (delta gorilla found in western Virungas) and Gorilla gorilla beringei (mountain gorilla). In 2003, after review, gorillas were divided into two species (Gorilla gorilla and Gorilla beringei) by the International Union for Conservation of Nature (IUCN).

After analyzing these measurement data, they found that “mountain gorillas can reliably transmit body shape information by beating their chest”. Specifically, large males will emit a lower frequency sound when they strike the chest. Researchers speculate that this may be related to their body’s large resonance cavity.

Researchers also found that males pound their breasts more often during oestrus in female gorillas, so the sound of the chest beats can be an important physical manifestation during flirting, a on the one hand, attracting children, and on the other hand, frightening the opponents.

Interestingly, the beats and timing of these gorillas have nothing to do with body size, and not that the larger the size, the longer the beat. The chest beat of each gorilla is like a behavior showing the different personality, duration and frequency that will carry the characteristics of each individual. Researchers have analyzed that personalized beats could allow other gorillas to distinguish who was beating their chest from them.

Mountain gorillas have been reported to have led to a threat of extinction due to poaching – mountain gorillas are often permanently injured by traps. hunt wild animals or take young individuals to zoos. Occupation – the rapid expansion of people’s settlements around the park’s safety corridor. Disease – mountain gorillas are regularly in contact with tour groups from all over the world, they can completely infect human infections. War, political turmoil – refugees flock to mountainous areas, cut trees and hunt gorillas for their meat for temporary life. Because of the above reasons, the World Animal Protection Organization and the host country government have increased patrols, using armed soldiers to remove traps, in addition to the work of determining the number of Gorillas mountain remaining. Expand the area of ​​the national park, require tour groups to stand away from monkeys, better manage this type of ecotourism. Another important part is educating the local community, spreading propaganda through materials and books and teaching students about biodiversity and protecting this endangered animal.

Ultimately, the scientists concluded that mountain gorillas live in dense rainforests, and sometimes they cannot see each other even when very close, but throbbing conveys personal information. it’s important for them to communicate.