What a dinosaur in the sky is must be in the sky, such as a pterosaur

The dinosaurs flying into the blue sky illustrate the trend of biological evolution from simple to complex, from low to high.

Dinosaurs flew into the blue sky and evolved from reptiles to birds, more advanced and complex than reptiles. Manifested as:

1. It has a high and constant body temperature, and only birds and mammals in the animal kingdom are homeothermic animals. The emergence of homeothermic animals marks that the structure and function of animal body splitting circle have entered a higher level, homeothermic animals have a higher and stable metabolic level and the ability to regulate body temperature, homeothermic animals reduce the dependence on external temperature conditions, expand the distribution area on the earth, and thus occupy a dominant position in the competition for survival.

2. It has the ability to fly quickly and can adapt to the changing environment by active migrationThe migration of birds is a positive instinct to adapt to the changing environmental conditions.

3. The heart is divided into two atria and two ventricles, and the blood circulation is a complete dual circulation. In this way, the complete separation of oxygen-rich and hypoxic blood, coupled with the improvement of the respiratory system, ensures that the blood contains sufficient oxygen. This or liter and birds have a higher level of metabolism and a high and constant body temperature is interrelated.

4. It has a well-developed nervous system and senses to better coordinate the unity of the internal and external environment.

5. It has perfect reproductive behaviors such as nesting, egg incubation and brooding, which improves the survival rate of offspring.

When it comes to dinosaurs, many people think that they are large, very bulky animals, and humans have concluded from some dinosaur and bird fossils that dinosaurs and birds are related, and it is very likely that birds evolved from dinosaurs.

In order for dinosaurs to be able to fly in the sky, they first had to make themselves smaller and grow a pair of wings. So the dinosaurs flew freely in the blue sky.

You can't fly just because you're light and don't have wings, so how did dinosaurs grow wings? Human beings have scattered among the fossils of ornithosaurs hundreds of millions of years ago, and dinosaurs have grown the initial shape of wings during this period, and many theropod dinosaurs also have wing-like structures, such as: microraptor and so on.

Later fossils of Odd Pterodactyls were found to have a long club-like bone key or head on their wrists, a structure not found in other dinosaurs. However, it has been seen in some flying animals, so it can be concluded that the Odd Pterodactyl had bat-like wings that could glide and fly freely.

The behemoth has evolved into a small body:

Everyone knows that weight determines the altitude, speed, and time of flight. So if the dinosaur wants to fly in the sky, it can't be dozens of tons of weight before, and it must make the body smaller and lighter.

Based on the analysis of more than 1,000 anatomical features of more than 100 dinosaurs, scientists have concluded that the size of theropods in dinosaurs has shrunk from generation to generation, until 50 million years later, from the original 163 kilograms to the size of Archaeopteryx, weighing kilograms. And since then, it has maintained a juvenile continuation, that is, from the body of childhood to adulthood.

Dinosaurs flapped their forelimbs like bird wings when they flew into the sky, grew feathers on their bodies, and jumped from tree to tree to avoid predators, gradually gaining the ability to fly.

The process of dinosaurs flying into the blue sky is mentioned in a popular science article written by Xu Xing, "Dinosaurs Flying to the Blue Sky". In the original text, some predatory dinosaurs gradually became smaller and more bird-like, with hollow bones and light bodies. The skull is enlarged and agile.

The forelimbs are getting longer and longer, and they can flapp like bird wings. They have developed beautiful feathers on their bodies and are no longer covered with scales or scale armor.

The evolution of dinosaurs:

1.The evolution of dinosaurs flying into the blue sky: the body gradually became smaller.

2.The body surface of the friend shouted that beautiful feathers had grown.

3.Move to the trees to survive.

4.Jump and land between trees.

5.Capable of gliding.

6.Eventually, it is able to fly actively.

Characteristics of the life of dinosaurs:

1.Foraging. Herbivorous dinosaurs were limited by their height in the plants they could eat, so some small herbivorous dinosaurs would stand on their hind legs in order to eat the leaves of plants at high heights.

Carnivorous dinosaurs fed on herbivorous dinosaurs and other animals. The different foraging patterns of various dinosaurs are also reflected in their hungry teeth.

2.Struggle. Sharp teeth and claws were preyed upon by carnivorous dinosaurs.

Tyrannosaurus dinosaurs often went it alone because they sought out lone herbivorous dinosaurs. Some dinosaurs would move in groups, locking on to their prey and swarming and slicing open the prey's belly with the claws of a second wild toe. <>

During the Mesozoic Era, a branch of dinosaurs evolved over a long period of time and eventually turned into a soaring bird that took to the skies.

The evolutionary body of the dinosaur flying into the blue sky gradually became smaller, and beautiful feathers grew on the surface of the body, and moved to the trees to survive, jumping and landing between the trees, with the ability to glide in He Chun, and finally able to fly into the sky on its own initiative.

Features of Dinosaurs:

1. Huge size, dinosaurs were one of the most massive animals in prehistoric times, and some of them even weighed more than 10 tons.

2. Dinosaurs can move freely on land, in water and in the air.

3. Reptiles, dinosaurs belong to reptiles, and their body structure has typical lizard-like characteristics.

4. Long lifespan, according to scientists' research, some dinosaurs can live for decades or even hundreds of years.

5. Different species of dinosaurs have different eating habits, including carnivorous predators and herbivorous dinosaurs that feed on plants.

6. Light bones, despite their large size, the bones of dinosaurs are relatively light.

7. Highly intelligent, dinosaurs are a highly intelligent animal, and their intelligence level far exceeds that of other reptiles.

8. Social animals, many dinosaurs tend to live in groups, and this kind of social state can improve their ability to live and shoot first. <>

Refers to a part of the dinosaur group that is closely related to birds.

This sentence comes from Xu Xing's "Dinosaurs Flying to the Blue Shed Sky", which mentions that birds may have evolved from an ancient dinosaur. One here refers to a part, a small group in the large family of dinosaurs. The reason why "one" is used is because not all dinosaurs evolved into birds.

As can be seen from the following, this group of dinosaurs should have had feathers, were closely related to birds, and had many similarities in skeletal structure with birds. At the end of the 20th century, Chinese scientists discovered for the first time dinosaur fossils with feather impressions in western Liaoning, which can prove this.

Pterodactyls are a big family, and there are more than 200 effective species found so far, but this is only the tip of the iceberg, there are still many pterosaur fossils waiting to be discovered, and there are also many pterosaurs that have not left fossils and have been annihilated in the long river of history. The largest known pterosaurs were Knott's Aeolian Pterodactyl, Albert's Pterodactyl and Hatezgo's Pterodactyl, all of which had a wingspan of 10-12 meters and weighed 200-250 kilograms.

Pterodactyls are mainly divided into two main groups, namely the suborder Beacosaurus and the suborder Pterodactyl. The suborder of the beak-billed dinosaur was relatively small in size, with wide wings, a short neck, a short and strong skull, and a very large wing membrane. On the other hand, the pterosaur suborder was huge, with narrow wings, a long skull (mostly toothless), small hindwings, and a short tail.

They all have a spine, but the spine of the pterosaur suborder was very large and complex. The largest pterosaur in the pterosaur family weighed 250 kilograms, reached a wingspan of more than 10 meters, and was about the height of a giraffe.

The wing membrane of the pterosaur is composed of **, muscles, and other soft tissues, and the wing membrane is hollow from the sides of the body to the extended fourth finger, and their bones are hollow and very light, minimizing body weight, but still very strong. They have ridge-like sternums that attach flying muscles. The respiratory and circulatory systems of pterosaurs are also very advanced, in short, the body structure of pterosaurs can fully meet the needs of flight, but there is no consensus on how pterosaurs took off.

Recent studies have shown that the Aeolian pterosaur probably used its hind and rear limbs to bounce and take off. Because of the large number of columnar supports inside the bones, and the longitudinal grooves on the surface of the bones, these features are clearly used to strengthen the bones, which are far stronger than they need to fly. Add to them the large number of tendons distributed in their forelimbs, and their strength is also more than necessary for flight.

Therefore, when the Fengshen pterosaur took off, it was likely to face the wind, do a "super strong push-up", "bounce" itself to a height of more than two meters with its forelimbs, and then take off with its wings.

While many animals can glide through the air, pterosaurs, birds, and bats are the only vertebrates that fly by flapping their wings. All three groups of animals are descendants of animals that live on the ground, and their wings have evolved in a similar way, with their forelimbs gradually becoming longer, like blades, and having aerodynamic properties. Large pterosaurs need strong limbs to get off the ground, but the thick bones can make them too heavy.

So the wing bones of the pterosaur are hollow tubes, and the bone walls are not thicker than playing cards. Like bird bones, they are flexible and lightweight, while being reinforced by internal pillars.

Many people have always had a misconception that pterosaurs were flying dinosaurs, but in fact pterosaurs were not dinosaurs, but separate pterosaurs, and dinosaurs are a collective term for sauropods and ornithischians. Pterodactyls were the first vertebrates capable of autonomous flight, an evolutionary branch of reptiles, which existed from 100 million years ago to 66 million years ago, throughout the Mesozoic Era, in the same period as the dinosaurs.

It is unknown how much it can fly to the sky, but it can fly to the sky thanks to its wings, which have enough strength to support her body, and when the weight of the wings is greater than the weight of the body, it can fly into the sky.

The weight of the pterosaur should be about a few hundred catties, and it can fly into the sky because its wings are stronger than its body.

The dinosaur species that flew to the stool high in the blue sky are:

Pterodactyl, Archaeopteryx, Dexterous Jane-Hand Dragon, Hearst Nearornithosaurus, Millennium Chinese Ornithis, Chinese Dragon Bird, Confucius Bird, Four-winged Microraptor, Hot River Bird.

1. Pterodactyl. Pterodactyls, also known as pterosaurs, are an evolutionary clade of flying reptiles that lived from the Late Triassic to the end of the Cretaceous, about 210 million to 65 million years ago. Pterodactyls were the first vertebrates to fly, and the wings of pterosaurs were derived from the membrane located between the sides of the body and the four wing phalanges.

Pterodactyls ranged greatly in size, from the small forest pterosaur as a bird, to the largest flying creatures ever seen on Earth, such as the Aeolus pterosaur and the hatezgow pterosaur, with a wingspan of more than 12 meters, teeth 10 centimeters long, and a huge pointed beak. The largest pterosaurs could reach 6 8 m when their wings were spread.

2. Archaeopteryx.

Archaeopteryx is a carnivorous dinosaur that can fly, it is the only avian dinosaur found so far, living in the Jurassic period of about 100 million years ago, Archaeopteryx has asymmetrical feathers on its forelimbs, it can use the airflow pressure difference generated up and down the feathers, so that the limbs can obtain a lifting force and achieve a certain flight.

3. Dexterous simple hand dragon.

The dexterous Jane-handedorosaurus is a jujube-ruler dinosaur species with large claws on its forelimbs, which lived hundreds of millions of years ago. It is a genus of dinosaurs of the superfamily Avala Cilong, which lived in northwest China in the late Jurassic period, and the fossils were found in the Shishugou Formation in the Junggar Basin of Xinjiang in the 1990s. At one time, the Avala Cisauridae family was classified as a bird.

The researchers also determined the evolutionary location of the Avala Cisaurus, which is the basal group of chiraptors. The researchers also speculated that the Avala dinosaurs may have evolved from Asia.

4. Hearst near-ornithosaurus.

Hearst Nearosaurus was a four-winged feathered dinosaur, also known as Nearbird, a small feathered dinosaur belonging to the family Sauridae. The fossil was found in Liaoning Province, China, and was dated to the middle or late Jurassic period, and is the earliest known dinosaur of the feathered theropod order. The newly discovered fossil of Hearst near ornithosaurus has clearly distributed feather imprints around its skeleton, especially the strange flight feathers on the fore, hind limbs and tail, a feature that has no precedent in an extinct species.

5. Millennial Chinese Bird Dragon.

The Millennium Chinese Ornithosaurus is the fifth feathered dinosaur to be discovered. At the end of the Cretaceous period, about 100 million years ago, the body length of the millennial ornithosaurus was about 90 120 cm. The Millennium Ornithosaurus was a small theropod (carnivorous) dinosaur about 100 million years ago, and its feathers were originally used only to maintain body temperature.

Of all the advanced theropod dinosaurs, the galloping carnivorous Benosaurus is probably one of the most closely related to birds. <>