What does it mean when a bird doesn t fly? Asuka Chisato didn t dare to come to what it meant

The bird does not see the bird flying, which means that the bird is not seen flying, and the bird is not seen flying.

In other words, there was no sign of the birds.

Birds. Birds are usually feathered, oviparous animals with a very high metabolic rate, and the long bones are mostly hollow, so most birds can fly. Birds evolved from reptiles, and there are more than 9,000 species of birds in the world, all of which have wings and feathers, even those that have lost the ability to fly (such as ostriches, penguins, etc.).

The first birds appeared 100 million years ago.

The body is spindle-shaped, the forelimbs are specialized into wings, the body surface has feathers, the body temperature is constant, the musculothoracic is developed, the bones are healed, thin, hollow, and the brain is relatively developed. Having an air bag allows for double breathing, and not having a bladder can reduce body mass. These physical traits are well adapted to flying.

Birds have no teeth but have beaks that can be used to hunt, build nests, and groom their feathers. Birds are good at building nests, and they can build all kinds of nests from the materials they collect. Ornithischia is taxonomically a class under the subphylum Vertebrates.

Feather. Birds are the only animals on earth that have feathers. The vast majority of a bird's body surface is covered with feathers, which not only keep the bird at a constant body temperature, but also allow it to fly. Birds have different shapes of feathers.

Structure. The ** of a feather has a hard shaft, called the feather shaft, the upper feather part is called the feather trunk, and the lower part inserted into the ** is called the feather root. The feather trunk is flanked by feathers, which are made up of a tough substance called keratin, which in turn is made up of feathers and branchlets.

Grow. Feathers are grown from the follicular vesicles of the feathers on birds**, and the parts are grouped together in a special way. Most birds moult at least once a year, when new feathers grow and old feathers fall off. Birds renew their already damaged feathers through moulting.

Freshman. Birds usually moult twice a year, which shows that feathers have a strong ability to regenerate. Scientific studies have shown that feather stem cells are distributed in a ring on the wall of the feather follicular vesicle, which can proliferate and differentiate, and the differentiated cells grow upwards to produce feathers.

The proliferation and differentiation of feather stem cells allows the entire feather organ of birds to grow and regenerate.

Type. Bird feathers can be broadly divided into four types: body feathers, down feathers, tail feathers, and wing feathers.

The body feathers cover the whole body, forming a smooth, streamlined body surface of birds; The down is fluffy, so that the warm air will not dissipate quickly; The tail feathers and wing feathers are more powerful and are used for flight.

If you want to see him, he means that the bird will not fly away when he sees him.

The migratory birds flew back from thousands of miles away, but they did not dare to come near.

Original article: Fan Envy:

The volcano is abrupt and the mouth of the red pavilion is thick, and the volcanic socks are thick in May.

The fire clouds are full of mountains, and the sect has not been opened, and the birds dare not come for thousands of miles.

The wind is broken at the beginning of the day, and the twilight returns with the rain.

Swirling obliquely swallowing the Tieguan tree, the atmosphere is half-covered by the river.

The road to the east of the mountain, the lonely cloud on the mountain with the horse.

Translations. The volcano stands tall above the mouth of the Red Pavilion, and the fire clouds are thick over the volcano in May.

The fire clouds covered the mountains and ridges, and the birds did not dare to fly for thousands of miles.

The fire cloud was just blown off by the Hu wind in the early morning, and turned back with the rain in the evening.

The loop engulfed the Tieguan tree, and the transpiration spread and half covered the Jiaohe Shu.

Your journey is in the east of Huoshan, and the lonely clouds on the mountain will follow you to the east.

Although flying brings great convenience to the life of birds, flying is also very physically demanding, so once the survival pressure of birds is reduced, they are easy to "lazy" and do not want to fly. From the known fossil record, as early as the late Cretaceous, some birds that lost their ability to fly appeared already. It was only in the Cenozoic Era, 65 million years later, when the traditional dinosaurs completely disappeared, that many huge birds appeared on the earth and completely lost their ability to fly.

50 million 40 million years ago, birds were the most powerful carnivores on land at that time. During this period, large mammals mostly ate plants, and meat-eating mammals were too small compared to these large birds. At that time, the birds that dominated the land generally had extremely vestigial wings and were incapable of flight, but they had well-developed legs, were able to hunt down prey quickly, and usually had large heads and terrible beaks.

Most of these terrifying bird fossils have been found in Europe and the Americas, such as the Gaston bird. However, since the 80s of the 20th century, the fossilized skeleton of a large carnivorous bird has also been unearthed in Henan, China. Scientists named it the Central Plains Bird according to its origin, and the age is about 50 million years ago.

This means that there used to be some ferocious large birds roaming the land of ancient China.

However, flightless birds are not all ferocious predators, and some giant birds are actually very gentle. Flying and not being able to fly is actually an adaptation, but one thing seems to be certain, once the bird's flight organs have deteriorated, it is impossible to fly again.

Because some birds can fly, it has been trained in nature by nature, while some birds cannot fly because they are artificially fed and have lost the ability to fly.

The flying organs of birds are different, they mainly have wings and feathers that become from their forelimbs, and the real flight function in the feathers is the flight feathers and tail feathers, the flight feathers are long on the wings, and the tail feathers are long on the tail.

This feather is composed of many slender feathers, each of which is densely packed with rows of feather branches, and there are hooks on the feather branches, which are hooked together to form feathers, which fan the air and make the birds soar into the air.

There are some birds that can fly, but there are some birds that can't, which is the reason for evolution, to adapt to different living environments.

Well, the reason why some can fly and some can't be parallel is because their wings are different, and their words are different in the environment in which they grow, well, that's what is said in the theory of biological evolution.

Every bird lives in a different way, if all of them can fly, it will definitely be because other large birds choose other birds as food, while small birds have nowhere to run and will become extinct, and their way of life is the most beneficial for themselves.

Because the species of birds are different, and the acquired growth environment is also different, like the more common chickens, in fact, they also belong to birds, just because of long-term breeding, chickens have almost lost the ability to fly.

My bird can fly because its wings are relatively large and can move its body, but some birds can't because its weight is uncoordinated, and its wings can't move its fat body.

As a result of survival adaptation, some functions have evolved and some have degenerated.

Asuka didn't dare to come:

This is to describe the sunset, which means: migrating birds fly back thousands of miles away, but dare not approach.

The volcano is full of clouds and has not opened, and the birds dare not come for thousands of miles: the fire clouds are shrouded in the smoke and clouds on the mountain, and they will not disperse for a long time;The migrating birds flew back from thousands of miles away, and when they saw the mountain burning, they did not dare to approach.

The landlord is very difficult to guess the question.

It's harder, I mean, it's harder to be comprehensive.

Okay, let me challenge this difficult question.

What bird can't fly?

Because "won't" can be interpreted as "can't" in some cases

So, the following species of birds "can't" fly:

1. All newborn birds.

2. Dead birds. 3. Deformed birds - for example: born without wings.

4. Caged birds.

5, etc. Some of the birds that really "can't" fly are: ostriches, "Galayan coot" (a remote island in the northern Philippines).

Okay, landlord, I'm already exhausted in the group type of donkey skills...

Ostriches, turkeys :), there should be many more.

1. The meaning of flying birds who dare not come for thousands of miles.

Birds don't dare to fly for thousands of miles.

2. Original text. Volcano Cloud Song, farewell.

Author] Cen Shen.

Dynasty] Tang Dynasty.

The volcano is abrupt and the mouth of the red pavilion, and the volcano is thick in May.

The fire clouds are full of mountains and have not yet opened, and the birds dare not come for thousands of miles.

The wind is broken at the beginning of the day, and the twilight returns with the rain.

Swirling obliquely swallowing the Tieguan tree, the atmosphere is half-covered by the river.

The road to the east of the mountain, the lonely cloud on the mountain with the horse.

3. Translation. The volcano stands tall above the mouth of the Red Pavilion, and the fire clouds are thick over the volcano in May.

The fire clouds covered the mountains and ridges, and the birds did not dare to fly for thousands of miles.

The fire cloud was just blown off by the Hu wind in the early morning, and turned back with the rain in the evening.

The loop engulfed the Tieguan tree, and the transpiration spread and half covered the Jiaohe Shu.

Your journey is in the east of Huoshan, and the lonely clouds on the mountain will follow you to the east.

The white wagtail (scientific name: Motacilla alba) is a small songbird of the passerine wagtail family, with a total length of about 18 cm, a wingspan of 31 cm, a weight of 23 grams, and a lifespan of 10 years. The body feathers are black and white.

It can be found near villages, rivers, streams, ponds, etc., and can be seen in farmland and pastures close to the water. Frequent activities in pairs or small groups. Feeds on insects.

Walk on the ground while foraging, or hunt insects in the air. It moves forward in waves when flying, and its tail swings up and down when it is stopped. The breeding period is in March and July, and the nest is built on roofs, burrows, stone crevices, etc., and the nest is composed of grass stems, fine roots, bark and dead leaves, and the nest is cup-shaped.

Each clutch lays 4 5 eggs. It is mainly found in most of Eurasia and the Arab region of northern Africa, and is widely distributed in China.