What is the change in formation of geese when they fly?

In autumn, people often see flocks of geese flying south in the sky, and they are babbling and skimming the sky.

Geese are winter migratory birds. There are many species of geese, such as gray geese (wild geese), red geese, bean geese, black geese, snow geese, bar-headed geese, white-fronted geese, small white-fronted geese, red-breasted black geese, etc. Because geese have different species and breeding sites, they also have different living habits, so their migration routes are also different.

The hometown of wild geese is in Siberia, every autumn and winter, they migrate south in groups, and there are two main ways to fly: one route from the northeast of China through the Yellow River and the Yangtze River basin, to Fujian, Guangdong coast, and even as far as the Nanyang Islands; Another route passes through China's Inner Mongolia and Qinghai to Sichuan, Yunnan, and even as far as Myanmar and India to winter. The following year, they flew back to Siberia to lay eggs and breed.

When geese fly, they are often arranged in the shape of a "human" character or an oblique "one". Some say this is a sign of strict discipline in the flock, but in fact, it is a secret to some migratory birds saving physical exertion during long-distance migration.

When birds fly, the tips of their wings create a forward-flowing air flow called a "tail vortex".The birds in the back make use of the "tail vortex" in the front, which is much less effort when flying. The formation of the geese when flying is suitable for the use of the "wake vortex" air flow.

The more geese there are, the less effort it will take to fly. At the same time, flying in line can also defend against enemies, take care of each other, and avoid falling behind. Because the leader goose has no "tail vortex" to use, it is the hardest, so the formation of the goose flock often changes, and its role is to rotate the head goose, so that it is not too tired.

Geese fly very fast, they can fly 70 to 90 kilometers per hour, and they have to fly for a month or two for a long journey of thousands of kilometers.

This is how geese migrate from north to south not only in Asia, but also in European and North America. Whenever the autumn wind sweeps away the leaves, the flocks of geese in Northern Europe move south to Africa, and the flocks of geese in North America move south to South America. In the spring of the following year, they fly back to their "homeland".

In the evening, the geese fall to the ground and roost among the reed ponds and the grass by the river, looking for aquatic plants to eat, and also eating wheat seedlings and broad bean seedlings in the field. The wild goose is very clever, and when it rests at night, it always sends a wild goose to stand guard and sentry, and when there is any movement, it will make a cry and call on his companions to fly away quickly.

The next morning, before takeoff, the geese often gather together for a "preparatory meeting".Then, the old geese take the lead and fly forward, like the "captain" leading the way, the young geese are in the middle, and finally the old geese are pressing the formation, and from time to time they make a babbling sound, which is a call signal.

It is directly related to external factors: wind, but the flight of geese is a collective activity, which is conducive to the integration of strength and strength.

The direction and speed of the wind are also related to the magnitude of the wind, because the big eye has to use the wind to rest and fly high.

It is related to the flow of the wind, which saves the physical energy of the geese.

It has to do with the flow of the wind, which saves energy.

The direction of the wind. The velocity of the wind.

Because doing so is more conducive to their flight, doing so can reduce the drag of their flight.

Because the wild goose is a very united bird, and this is also a flight signal for the wild goose, and this is also to save the physical strength of the wild goose, so when the wild goose flies, it usually lines up in a zigzag or herringbone shape.

Because geese are very regular animals, and in the process of flying, in order to ensure that their teammates do not fall behind, they will be arranged in such a shape.

It is because the geese need to keep the team neat when flying, and it is also to determine the direction, so that it is not easy to fall behind and can track the large army well.

Why do geese shoot a row and a herringbone when flying?

The geese fly in a "human" or "one" shape because they fly all day long, and the strength of one goose alone is not enough, and they must help each other to fly fast and far. When the vigorous geese flutter their wings and fly, the tips of the wings fan a gust of wind, and send them from below to the top, so that the geese will be gently lifted, and the geese will not be left behind after a long journey.

Generally by the front of the wild goose, is very powerful, very experienced, due to the head of the goose flapping the wings of the effect, drive the airflow, if lined up into a "human" shape or "one" shape to fly, the back of the wild goose to fly up will be very easy, do not have to rest many times. During the flight, a low pressure area will be formed behind the head goose, and the wild goose that follows it can use this low pressure area to reduce the drag of the air when flying. Beneficial to the ability to fly continuously for the entire group.

Team by team. There are a lot of rows.

Geese can also turn into snake shapes when slowing down.

Hahahahaha

Answer] :d geese are often arranged in a "human" shape or an oblique "one" shape when flying, because this formation is conducive to saving physical exertion when the geese fly long distances. When birds fly, the tips of their wings create a forward-flowing air flow called a "tail vortex".

The birds in the back make use of the "tail vortex" in the front, which is much less effort when flying. The formation of the geese when flying is precisely because of the use of the "wake vortex" air current. The more geese there are, the less effort it will take to fly.

The "wild goose formation" is led by the experienced "head goose", when accelerating the flight, the team is lined up in a "human" shape, once slowed down, the team is changed from the "human" shape to the "one" long serpentine shape, and the acceleration or deceleration of the wild goose flight will be affected by the change of wind direction.

Therefore, the correct answer is d.

<> change of the formation of wild geese is generally taken for long-distance migration, such as when accelerating the flight, the team is lined up in a "human" shape, and when slowing down, the team changes from a "human" shape to a "one" long serpentine shape. The change of the formation of the geese may also be to change the "head goose", because the "head goose" is easy to get tired after all, so in the process of long-distance migration, the geese need to change the formation frequently and change the "head goose".

Tips: Wild geese are wild protected animals, and the protection of wild animals starts from themselves, refuses to buy and sell wild animal products, and does not interfere with the free life of wild animals. At present, the consumption of rare and endangered wild animals in society is not only a bad social habit, but also one of the reasons for the repeated prohibition of illegal hunting and killing of rare and endangered wild animals.

If there is no trade, there is no killing, and the consumption of wild animals is not stopped, and they do not believe that the skin belongs to the table.