Author Description

Surviving in the bird world 2b How can birds fly in the sky?A world of exciting birds as you know it! bBirds that can fly can travel a great distance with their wings, You can adjust the height and speed freely. So humans have long wanted to resemble birds that fly freely from the sky. Numerous people have constantly challenged to fly, and after experiencing many failures, they finally can fly and invent gliders and planes. But regardless of these inventions, humans still can not fly without the help of machines. Because human body structure is completely different from bird. Birds have evolved from reptiles with feathers and have an optimized body structure to fly through the sky. The two wings are suitable to fly by using air flow and pressure, and the body is very light because the bone is empty. The weight of the bones is lighter than the feathers. Also, thanks to the strong muscles of the chest, you can overcome air resistance and vigorously flap your wings. In addition to flying in the sky, birds have diverse abilities. Parrots can be trained to follow people, and birds such as crows and magpies are very intelligent and use tools to solve problems. In addition, adaptive birds have learned how to live in harsh environments such as desert or polar regions. In addition, the vision is so advanced that the eyes are good enough to hunt small mice on the ground, even if they are flying in the sky. In this book, we learn about attractive birds that can fly and have various abilities. Albatross with the longest wings in the world, Bauer birds that make a nice house and courts the females, cuckoo that lays eggs in the nests of other birds, and owls that can see well at night. There is.