Chickens, ducks and geese have grown big wings, so why can t they fly, but they grow out for humans

Mainly because chickens, ducks and geese are all domesticated by humans, and their wings are very small and very short, so they can't drive their weight, so they can't fly.

It seems a bit like Lamarck's theory of "using money to advance and retreat", because these birds do not use wings for a long time, so the ability of wings to fly is degraded. Of course, it doesn't have to be for humans.

No, it is because due to the influence of the external environment and the ecological chain, chickens, ducks and geese basically no longer need to use their wings to fly to find food, and can find corresponding food on the ground to ensure their lives.

It is because they exercise less, they are particularly obese, after people's training, they just want to sell them at a good price, people think that the fatter they are, the better they are.

In terms of disciplines, chickens belong to the category of moa.

Section. It stands to reason that all birds should be able to fly, but the chickens and ducks we usually see are exceptions. Chickens and ducks are not considered, and we know that the largest bird in the world is the ostrich.

An ostrich can run fast, but it can't fly. Why? Because the ostrich is too big and heavy, its wings can't support it to fly.

Some people say that the ostrich wings are too small, so it can't fly. Not really. The ostrich wing is also large, but the burden on the wing is too heavy, so it can't fly.

That's why ducks can't fly.

Their wings can't support their body weight, so they can't fly. Chickens, ducks and geese cover almost all of our most common poultry. They can provide me with eggs, the first of the proteins, which is precisely one of the reasons why primitive humans chose to domesticate them.

Chickens and geese were domesticated by wild birds, and both of their ancestors had some ability to fly. But under artificial breeding, the most important ability to fly for the species itself, but the most useful ability that can cause loss to man, has become a bird that flapps its wings at most a few times and flies to the wall.

Poultry such as ducks and geese are domestic. They eat food fed by humans, so they are much fatter than wild birds. And their feathers are not as well developed as birds, and their wings are not enough to support them in high flight.

They can only try their best to fly a dozen meters at low altitude. Some very powerful chickens can fly into trees and houses, but they can't fly freely like birds.

Before humans raised chickens and ducks as poultry, wild chickens and ducks could fly. They flew around the forest, looking for food. Later, when humans raised them as poultry, they locked them up.

They don't have to fly around on their own in search of food, and they don't have to quickly flee from the enemy. Gradually, pheasants and mallards turned into obese domestic chickens and ducks, flying technology.

Gradually, the wings gradually lost the ability to fly. They don't exist to fly. Chickens and ducks lay eggs and crow.

This is their task. Flying is not their task. They are also not equipped to fly.

Poultry are usually kept in cages, and space also restricts their flight.

Of course, ducks and chickens have wings and can't fly, because after a long time, their bodies will become hungry. Because of the plan, they are more suitable for being on land. It turns out that before humans raised chickens and ducks as poultry, wild chickens and ducks could fly.

They flew around the forest, looking for food. Later, when humans raised them as poultry, they locked them up. They don't have to fly around on their own in search of food, and they don't have to quickly flee from the enemy.

Gradually, pheasants and mallards became obese domestic chickens and ducks, their flying skills gradually deteriorated, and their wings gradually declined. Birds have large bodies and few meats, well-developed flight feathers, and good flight ability. So chickens, ducks and geese have wings, but they can't fly freely like birds.

Ducks and geese can fly, especially in the wild, where they migrate long distances. Domestic chickens, ducks and geese have weakened their ability to fly because they usually fly less and are heavy.

Domestic chickens and ducks can actually fly, but in the same environment, domestic ducks are far less capable of flying than domestic chickens, and even domestic chickens have their own flight ability. Some chickens can only fly from the ground to cages tens of centimeters high, some can fly to walls, and some domestic chickens can even fly to trees. Chickens and ducks are all domesticated by wild birds, of which the ancestor of the chicken is the original chicken, and the ancestor of the duck is the mallard.

Mallards are experts in flying, and according to current research, wild mallards can fly up to 6,400 meters in the air and fly thousands of miles for migration. The ancestor of the domestic chicken is the raw chicken. Although the original chicken can fly, its flight ability is much weaker than that of wild ducks, because the original chicken likes to live in bamboo forests, and they do not have the habit of migrating.

It's fine to fly up to a tree or a hundred meters or so, but it's not okay if it's a long-distance migration or a flight into the sky.

The domestication time of the original chicken has been changed once. Back in 2014, about 8,000 years ago in India, the first domestic chicken bones were discovered. However, in 2014, Chinese ornithologists measured some chicken bones unearthed in China and found that there were domestic chickens in China as early as 10,000 years ago.

So China was the first country to domesticate the original chicken.

Although these two animals have large wings, they have degenerated during the evolutionary process, so they cannot fly.

Because the ancestors of ducks and chickens had degraded their wings during their growth, and because of their long-term captivity, their body fat and weight exceeded the limits of what their wings could carry, so they could not fly.

Because they were domesticated by humans and never had the opportunity to fly, their wings have degenerated.

Duck generally refers to duck. Duck is a general term for waterfowl in the duck subfamily of the order Duckidae, or true duck. Ducks are relatively small in size and have short necks, and some genera have larger beaks. The legs are located at the back of the body (like a swan), so the gait is staggering.

Reason: The reason why ducks can't fly is because in the process of long-term evolution, ducks have gradually been kept in captivity by humans and cannot fly in the air for a long time. As a result, their wings degenerate, and their bodies become heavier and heavier, and their wings can no longer drive ducks to fly, so ducks cannot fly.

In addition to ducks, chickens and geese cannot fly because they have been kept in captivity by humans from generation to generation, and they have no experience and experience in flying. They have gradually forgotten the feeling of flying in the air, and have lost their flying skills. Due to the long period of non-use of wings, the strength of the wings decreases, and the flying skills continue to deteriorate.

Eventually, the ducks influenced each other and gave up flying in favor of living on the ground or in the water. In addition to the forgetting of flying skills, the ducks have also given up the habit of migrating with the seasons.

Ducks mostly live in the water and like to swim in the water, and they look very comfortable swimming in the water. With the exception of ducks that are kept in captivity at home, the rest of the ducks, especially those that live in the wild, prefer to live in the water. They are also accustomed to hunting and resting in the water, mostly feeding on smaller animals and plants in the water.

Most of the ducks that people raise for food are wild ducks, that is, mallards. It was originally a species that was grown in the wild, but after being hunted by humans, its numbers have become less and less. In recent years, people have chosen to breed through artificial breeding, so that they can reproduce from generation to generation.

In the past, ducks were smaller, had a lot of wing power, and had a light body, so they were able to fly with just a slight wave of their wings.

It turns out that before humans raised chickens and ducks as poultry, wild chickens and ducks could fly, flying around the forest in search of food. Later, humans kept them as poultry and locked them up, so they didn't have to fly around on their own in search of food or run away from their enemies. Gradually, pheasants and mallards became obese domestic chickens and ducks, and their ability to fly slowly deteriorated, and their wings gradually lost their ability to fly high.

This long-term habit has changed their flying skills. Chickens, ducks and geese have large bodies and meat, underdeveloped flight feathers, and poor flight ability; Whereas, the bird has a large body and little meat, well-developed flight feathers, and a good ability to fly. So chickens, ducks and geese have wings, but they can't fly freely like birds.

Chickens, ducks and geese can fly, especially in the wild, where wild ducks and geese (i.e. geese) migrate long distances. Domestic chickens, ducks and geese, because they usually fly less, coupled with heavy weight, so the ability to fly is weakened.

Of course, ducks and chicks have wings and can't fly because their bodies are hungry after a long time. For the reason of the plan, they are more suitable on land.

Because chickens, ducks and geese are domesticated, they eat the food fed by humans, so they grow much fatter than wild birds, and their feathers are not as developed as birds, so their wings are not enough to support them to spread their wings and fly high, they can only fly more than ten meters away at low altitude, and some of the more powerful chickens can also fly to trees and houses, but they can't fly freely like birds.

Chickens, ducks and geese that eat too much are all domestic poultry in rural areas, and people feed chickens, ducks and geese in order to be able to gain weight one day, and then use them to eat or sell them for money, plus chickens, ducks and geese are greedy, so their weight is significantly more than that of wild pheasants and ducks. And these poultry do not worry about eating and drinking all their lives, in addition to eating the owner's leftovers, rice bran and rice, wild insects, grasshoppers, frogs are not less eaten, so most of them are fat and strong, no matter how thin they are, they are heavier than birds. It is precisely because of this weight that their wings are not enough to support themselves to fly high in the sky, coupled with the lack of flying exercise since childhood, so it is not surprising that chickens, ducks and geese cannot fly.

Feather and wing degradation Because chickens, ducks and geese have been kept in captivity by humans for thousands of years, their wings and feathers have been degraded to varying degrees. Their wings don't look like much, but they actually have a smaller proportional ratio to their bodies, and their flight feathers are not as good as those of birds. The heavier body than birds, combined with weaker wings and feathers than birds, all of these factors make chickens, ducks and geese unable to fly high and can only glide short distances.

In fact, chickens, ducks and geese can't fly in the wild, mainly because they have gained weight after being kept in captivity by humans, and they can't fly because they lack the exercise to fly. Except for wild chickens and ducks, many people who have been to the mountains know that there are still a lot of pheasants and ducks in the wild, they can often fly long distances, although they can not be compared with birds soaring in the sky, but they are also flying animals, and humans are far from catching up with their speed.

1. The degradation of wings is too serious, and ducks and geese can fly, but they can't fly high. Brother.

2. The weight of the body exceeds the average weight of the fiber-resistant body.

In the age of the dinosaurs, there were chickens, ducks and geese, and after hundreds of millions of years of evolution, their wings gradually degenerated, from the wild to the common domestic animals. As people raised them and even kept them in captivity, the ability to fly degraded little by little.

Penguins have wings, why can't they fly? （）

a.The goose is a mammal.

b.The penguin's body is too heavy.

c.Penguins do not fly for a long time in the process of evolution, and their wings are withdrawn, so they are not stupid to fly (correct answer).

d.It's too cold and the air temperature is too low.

1. Fly so high because the wings are powerful. Domestic ducks have a certain ability to fly, but they cannot be high or far. The degeneration of the wings is one of the reasons, and more importantly the weight gain. The average weight of domestic ducks exceeds that of swans and large birds.

2. This is related to the evolution of organisms, and many poultry (including chickens, ducks, and ducks) used to fly. After the ancestors of mankind caught these things that were previously seen flying in the sky, some of them were alive, and some of them could not be eaten for the time being.

3. Keep them in captivity, and over time, these things will be inherited from generation to generation, and they will slowly not fly. Ducks are artificially bred and bred by wild ducks, and after being raised by humans, their ability to fly decreases.