Also flying in the air, why do birds flap their wings but planes don t?

On Earth live a giant beast of the air, which weighs up to 70 kilograms and has a wingspan of up to 7 meters.

Like a light aircraft that can catch 36 pounds of prey, what is the evidence of their existence?

Biologists have found fossils of these giant creatures in both the Angus Mountains and the vast Pampas, and have pieced together a rough picture of what they looked like.

Known as the Argentine Giant Eagle, they did not become extinct until 250,000 years ago, and are believed to be the ancestors of the modern large bird of prey storks and vultures.

The answer to this question is to look to the large birds of prey that live in the area today, especially the vultures, which are close to the Argentine giant eagle.

The birds flying in the sky are much smaller than they were in prehistoric times, and one of the heaviest flying birds in the world: the Andean vulture, which weighed 32 pounds.

Although it is not worth mentioning compared to its ancestors, given the current energy supply of the Earth's biosphere, scientists still believe that it is a miracle that the vulture can fly and fly so well.

Because once a bird grows this big, it takes a lot of energy to flap its wings every time, and researchers estimate that birds like vultures use up to 30 times more energy when flapping their wings than when they are at rest.

Therefore, if a bird of this size wants to fly by flapping its wings, it is undoubtedly as tiring as a mammal running and sprinting on land.

It is estimated that it takes an hour to rest after flying a few hundred or several thousand meters. It's better to be a land animal. So scientists believe that vultures mainly rely on rising air currents to glide to fly.

But if you were to ask any bird expert, how many times does a vulture flap its wings during each flight? Will the changing environment and different weather conditions change the cost of their flight (energy consumption)?

No one can do that. But it was only recently that researchers solved the puzzle by using modern technology to monitor the flight of vultures from the air.

Because the flapping of the wings of a bird is equivalent to the wings of an airplane plus the engine, although the airplane does not need to flap its wings, it has a powerful engine, and if there is no engine, then the aircraft also needs to stir its wings to fly.

Birds generate the power to fly forward by instigating their wings, while airplanes have engines in them instead of wings.

Because the principle of birds and airplanes flying into the sky is not the same, first of all, birds, as birds, have wings to fly into the blue sky, which they are born with, and their bones are relatively light.

And the airplane is a very heavy behemoth, if you want to make it look like flapping wings and flying, then the size of this wing needs to be very large, and the wing is easy to damage in this way.

Because the speed of the aircraft is very fast, it is able to squeeze the air and create a strong lifting force, so the aircraft does not need to flap its wings.

Birds need to flap their wings to get power, and airplanes have engines and don't need to get a constant stream of power like birds.

The structure of a bird's wings means that it can glide or generate lift with the help of the velocity of the air flow above and below the wings.

So you can stay without flapping your wings.

This is related to the physiological structure of the bird, and if you look at the bird's wings, you will find that the upper surface is bulging and the lower surface is slightly flat, so the speed of the air flowing through the upper and lower surfaces of the bird's wings will be different.

Characteristics of the bird's suitability for flight:

The body is streamlined.

The surface of the body is feathered, and the forelimbs are specialized into wings.

The bones are strong and light, with many temperamental bones and a towering keel protrusion on the chest.

The pectoral muscles are well developed. Eat a lot and digest quickly.

The heart has four chambers, the number of beats is fast, and the circulatory system is perfect.

There are well-developed air sacs, which can both reduce weight and form a unique double exhaler roller with the lungs. In short, birds are a class of animals with feathers on the body surface, forelimbs specialized into wings, the ability to fly quickly, air sacs in the inner body, and a high and constant body temperature.

1. Birds fly by wings, not only to have wings but also to have developed muscles in the chest, which can pull the wing bones to carry out strong movement, so that the wings are flapped and the power of flight is generated.

2. Birds flapping their wings can not only make their bodies rise into the air, but also make them move forward and land smoothly.

3. The body of the bird is relatively light, the bones are very slender, and most of the bones are filled with air. Such a skeletal structure provides superior conditions for flight.

4. The internal organs of birds also provide favorable conditions for flight, birds do not have a rectum to store feces, nor a bladder to store urine, when they are flying, they can discharge feces anytime and anywhere, so as to reduce weight and facilitate flight.

1 For a bird has wings, which can generate power to make it fly.

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