Видео по теме: Бобер раскраска для детей
Как нарисовать Бобра. Раскраска Бобер для детей
Описание видео: В данном видео уроке вы научитесь рисовать и раскрашивать Бобра шаг за шагом, очень легко для детей.
Развивающие мультики для детей малышей - Удивительная стройка - Все серии - Учимся считать
Описание видео: Будем рады вашим комментариям и отзывам!
Бобр добр - Сборник новых мультиков для детей #домавместе | серии 26-39
Описание видео: домавместе #смотримвместе #Бобрдобр - красочный остроумный #мультфильм про приключения Бобра и его команды.
Читать далее
Бобры: Лучшие строители в мире животных | Интересные факты про бобров
Описание видео: Приветствую, Вы на канале "Планета Земля". Здесь мы будем изучать интересные факты о нашей Земле. Животный мир, ...
Читать далее
from the name brown, and the overseas brother is called a beaver, but this is theirs, and ours is Beaver. And some say Beaver. But linguists disagree. According to linguistic sources, the word beaver should be used in the meaning of an animal from the order of rodents with valuable fur, and beaver in the meaning of the fur of this animal, but we will only talk about fur when it is on an animal, and it is more pleasant for a beaver to walk in his fur coat and not in a stranger for this reason we will say beaver. Beavers first appeared in Asia, where their fossilized remains date back to the Eocene. The most famous of the extinct beavers are the giants of the Pleistocene. For example, Siberian prehistoric beaver and North American. The growth of the latter, judging by the size of the skull, reached 3 m, and the mass was 350 kg, so the capybara was a tiny mouse compared to our hero. And in the future, part of the beavers migrated to America, and on their own, and not because raccoons were comfortably brought by plane to Eurasia. And about this in a video about raccoons and we have a handsome beaver. Modern beavers are slightly smaller than their ancestors. Adult individuals have a length of up to 1.3 meters, with a height of up to 35 cm, while their weight can reach 30 kilograms. Everything in the appearance of the beaver is adapted to a semi-aquatic lifestyle. The body of the beaver is squat, because it has rather short legs. Between the fingers are membranes, thanks to which the beavers feel great in the water. The claws on the paws are flattened and quite powerful. Yes, there are paws. All eyes on the tail. The tail of a beaver is noble - flat and similar to an oar. Its length is about 30 cm, and its width is about 13 cm, while there is no wool on it, and if it does, it is only at the very base. The ears and nostrils of the beaver have the ability to close under water, and the eyes are closed with nictitating membranes. The incisors (teeth) are isolated from the oral cavity by special outgrowths of the lips, which allows the beaver to gnaw under water and not choke. All these adaptations allow beavers to swim and dive excellently. And the large lungs and circulatory system provide them with such reserves of oxygen in the blood that an ordinary beaver can dive for as much as 5 minutes to a depth of four meters. During the night , an ordinary beaver can swim up to 20 kilometers, but not immediately, but intermittently. The beaver has beautiful fur, which consists of coarse guard hairs and a very thick silky undercoat. And of course, it is also suitable for swimming and is practically waterproof. The color of the coat largely depends on the living conditions, so it can vary from light chestnut to dark brown, and often almost black. Previously, beavers lived almost throughout Eurasia, but due to intensive human prey, by the beginning of the 20th century, the beaver was practically exterminated in most of its range. The current range of the beaver is largely the result of efforts to restore its population, and the same thing happened with its American cousin. Why is everything so sad? Because just because of their beautiful fur, as well as because of the jet with a secret that is used in perfumery, beavers have long come under close attention from the human side, and even now there are enough lovers to eat beavers, although this is for lovers of rodent meat. And we are returning to the life of beavers before, not after. These rodents like to live, mainly near medium-sized rivers, canals and banks of water bodies, avoiding extremes: large full-flowing rivers, or vice versa - too small. Moreover, it is very important for beavers to have trees and shrubs from soft hardwoods along the banks of the reservoir, as well as an abundance of aquatic and coastal herbaceous vegetation, which is their main menu. Beavers live in families, rarely alone. A complete family consists of 5-8 individuals: a married couple and young beavers. Moreover, one family can live in the same territory for generations. The length of the family plot along the coast ranges from 300 meters to 3 km. At the same time, beavers rarely move more than 200 m from the water . Beavers mark the boundaries of their territory with the secret of musky glands - a beaver stream. Marks are applied to special mounds of mud. Beavers communicate with each other with the help of odorous marks, postures, tail blows on the water and screams resembling a whistle. In danger, a swimming beaver slaps its tail loudly on the water and dives. The clap serves as an alarm to all beavers within earshot. In winter, the family of beavers lives in a hole. In spring, with the appearance of greenery, the beaver family disperses within the habitat area singly or in groups of 2-3 beavers. In autumn, families gather again in one place. The habitat of a beaver family with its own burrows, huts, manholes, paths, dams, canals is commonly called a beaver settlement. And all beaver settlements, grouped on a certain section of the river, are called a colony. By the way, matriarchy reigns in the family of beavers, that is, the head of the family is exclusively the female. The mating season lasts from mid-January to late February; mating takes place in the water under the ice. Pregnancy lasts 100 days. Cubs from one to six are born in April-May. They are semi-sighted, well pubescent, weigh an average of a pound. After a day, they can already swim, but they are not yet able to dive and hide from danger. Mom teaches beaver cubs, literally pushing them into the underwater corridor. At the age of 3-4 weeks, beaver cubs switch to feeding on leaves and soft stems of grasses, but the mother continues to feed them with milk for up to 3 months. The grown up young usually do not leave their parents for another 2 years. Only at the age of 2, young beavers reach puberty and move out. Having separated from their parents in the spring flood, two-year-olds go along the rivers, find a mate for themselves and, having chosen a place suitable for life, not inhabited by other beavers, form a new family. In captivity, the beaver lives for quite a long time up to 35 years, in nature - less. So what is so unique about a beaver, you ask. The rodent and the rodent are not the biggest either. And the fact that it is an unsurpassed builder of houses and dams in the animal kingdom. Beavers, being family men, build stunning castles with a security structure at the entrance in the form of a hut for their beloved female and offspring. The entrance to the hut is always under water - which is logical - land-based predators will not get there. But for the same as himself, for example, desmans and muskrats, the beaver will always have a guest room. Beavers burrow in steep and steep banks; they are a complex labyrinth with multiple entrances. The walls and ceiling of the burrow are carefully leveled and compacted. The living chamber inside the burrow is arranged at a depth of no more than 1 m. The width of the living chamber is a little more than a meter, and the height is 40-50 centimeters. The floor must be 20 centimeters above the water level. If the water in the river rises, the beaver lifts the floor, scraping the earth from the ceiling. From under the water to the surface of the land, through passages are made - manholes. The huts look like a cone-shaped pile of brushwood, fastened with silt and earth, up to 1-3 m high and up to 10-12 m in diameter. The walls of the hut are carefully coated with silt and clay, so that it turns into a real fortress, impregnable for predators; air enters through a hole in the ceiling. The hut at the base always has a solid foundation - for example, an old stump. With the first frost , the beavers additionally insulate the huts with a new layer of clay. In winter, a positive temperature remains in the huts, the water in the manholes does not freeze, and the beavers have the opportunity to go into the under-ice thickness of the reservoir. And what do you think, this is all and only such a grandiose drawing is in the head of a beaver, although this is not enough for a seemingly ordinary rodent. No, it was necessary to think about entering under water, because the water level in the rivers is a variable value. And here the engineering genius of the waterproof beaver is revealed in all its glory. For this, there are famous beaver dams. They are created to regulate the water level in the huts. Beavers make dams that any builder would envy. When building their dam, beavers take into account the speed of the river and its full flow. The shape of the dam depends on these factors, as well as runoff in case of floods. By the way, beavers are very clean, they never litter their homes with leftover food and other waste products. The usual length of the dam is 20-30 m, the width at the base is 4-6 m; height can reach 5 m, although usually - about 2 m. And quite strong. The old dam can easily support the weight of a person. For construction and forage, beavers fell trees, gnaw them at the base, gnaw off branches, then divide the trunk into parts. A beaver fells an aspen with a diameter of 5-7 cm in 5 minutes; a tree with a diameter of 40 cm fells and cuts during the night, so that by morning only a skinned stump and a bunch of shavings remain at the place of work of the animal. How does a beaver do it? The jaws of a beaver act like a saw: in order to fell a tree, the beaver rests its upper incisors against its bark and begins to quickly move its lower jaw from side to side, making 5-6 movements per second. The beaver's incisors are self-sharpening: only their front side is covered with enamel, the back consists of a less hard material. When a beaver gnaws on something, this material wears down faster than enamel, so the front edge of the tooth remains sharp all the time. Enemies in adult beavers are relatively few - wolves, lynxes, bears, wolverine. Some zoologists refer to them as an otter. The beaver and the otter live in the same environment and often meet each other. However, there are very few reported cases of otters attacking beavers. Therefore, one can think that the sharp strong incisors of adult beavers are quite reliable protection and keep the otter at a respectful distance. And not only an otter. A beaver can not fight back a mouse. As they say, someone who comes to us with a sword from a beaver will die. And I wouldn't bother with them again. In young beavers, especially in beavers of the current year of birth, the circle of enemies is much wider. In addition to those listed, it is a fox, a raccoon dog, a mink, a marten, a polecat. Of the birds, the eagle owl and other large owls, the goshawk, the black kite, and the osprey are dangerous for beavers . There are known cases of finds of the remains of beaver cubs in the stomachs of catfish and large pikes. Well, let's move on to the beaver's shortcomings. What could be the disadvantages of such a beaver business executive, you ask? So think some people who live directly with them, but not with them, but not far away, in neighboring houses. Beavers often become the culprits of local environmental disasters in quotation marks. What does the beaver have to do with ecology? Direct! Our cute rodent creates a unique ecosystem with its tree cuts, dams and lodges, changing the landscape and creating a new space for a bunch of other creatures to live. It practically raises virgin soil, where birds, fish (yes, they also run) and other mammals run in droves. Fish, once in favorable conditions, begin to multiply. Trees felled by beavers serve as food for hares and many ungulates, which gnaw bark from trunks and branches. Butterflies and ants love the juice flowing from undermined trees in spring, followed by birds. At the same time, beaver dams can harm human buildings. Beaver spills have been known to flood and wash away streets and railroad tracks, and even cause wrecks. And, in fact, only the person suffers. Everyone adjusts , one person does not want to, considering himself the most important thing on the planet. But the beaver is not very well versed in the global plans of man to conquer the earth. He is closer to his own female and a castle for her and offspring, and for the neighbors of the world around him. And if there is a beaver-architect helping other animals in the course of his life, this is good. And no one, in fact, does not interfere with anyone. The main thing is that everything should be in moderation. Watch, listen, write, subscribe. Don't forget to like and share this video with your friends, it really helps promotion. With you was the channel planet earth.БОБР (Beaver). Энциклопедия дикой природы
Описание видео: Документальный фильм о жизни бобра в дикой природе. Бобры - одни из самых удивительных животных на земле.