-
Why do the geese always fly in a "zigzag" or "herringbone" formation? This is because geese fly long distances, and in addition to flapping their wings, they often use updrafts to glide in the sky, so that their wings can rest intermittently and save their physical strength. When the flock of geese flies, the wings of the geese in front of them cross the air, and a faint updraft will be generated on the tip of the wing, and the geese behind will fly closely behind the tip of the front goose in order to take advantage of this air flow, so that one follows the other, and they form a neat line.
Wild geese fly all the way from the north, through thousands of mountains and rivers, and after about a month or two of long-distance air travel, they reach the tropical region with warm winds and warm days. There they are able to find abundant food and escape the cold of the north, while the females and males begin to mate. By the time spring comes, the female goose has already given birth to mature eggs, so she flies back to the north to lay eggs, hold nests, and nurse her offspring.
Wild geese are famous migratory birds, their homeland is in the northern Siberian region, because the northern summer sunshine hours are long, food is abundant, and there are not many predators, which is very suitable for raising young children, so they always return to their hometown to breed offspring. In winter, when the north is covered with ice and snow, no insects, worms, and plant seeds are gone, and geese cannot find food to eat, so they fly in flocks to the warmer south. During the journey, the movements of the flock of geese are very regular, most of them are led by experienced old geese, leading the team in the front, and the rest fly in a "zigzag" or "herringbone" formation in the back.
They are flying and calling, often making a non-stop cry of "Yihe, Yihe".
-
U-line queuing can reduce the drag of flight.
-
In a dense primeval forest, a pair of white cranes in the blue sky.
The dao flew by, and they were among the reeds at the edge of the river not far away.
The right to perch and nest. At this time, the mother crane found a dying bird lying on the beach, which was a lone swallow that had been left behind due to injury. Mother Crane said to Father Crane:
This child is so pathetic, if we don't help her, she will die soon. Father Crane also said, "Then let's quickly carry her into the house and bandage her wounds."
So, they cleaned the swallow's wounds and fed her, as if they were their own children. After a month, Xiaoyanzi's injury finally healed. One day, the swallow bowed deeply to the white crane couple:
Thank you for saving my life, I'm leaving, going to the south to find my mom and dad, thank you, I will always remember you. Good bye! The white crane couple caressed the little swallow's head lovingly and said
Go ahead, go find your mom and dad, be careful all the way, goodbye! ”
During the Sui Dynasty, the Grand Canal built by Yang Guang was a project that was extremely disgusting to the common people, and in the eyes of most people at that time, the only role of the Grand Canal built by Yang Guang was to work the people and make the people suffer hardship. So, what was the purpose of Yang Guang's construction of the Grand Canal at that time, and was he really just for his own enjoyment? Experts say that if you connect the routes of the Grand Canal, you will understand. >>>More
Children express their dissatisfaction by crying loudly, because children's language skills have not yet developed well, and they have not yet learned to communicate with language.
Hello! It can reach the ground through all the gases in the atmosphere. >>>More
According to the egg structure.
The principle of biomimicry was used to invent the thin-shell structure. >>>More
Money is just an instrument and has no value in itself. If there is too much money, then the money is not money, it is worthless, because everyone has a lot of it. Correspondingly, they buy a lot less for the same amount of money. >>>More