About the evolution of birds, what birds evolved from, what birds evolved from

Birds evolved from dinosaurs.

Scientists have studied the fossils of "Pennylosaurus" and "Urad Hemiclaw" and found that they have common characteristics of dinosaurs and modern birds, that is, their bodies resemble those of a cuckoo, a bird skull, and two rows of tiny teeth. These two "intermediate transition" fossils mark a transitional stage in the evolution of birds.

Birds have evolved over tens of millions of years, from reptiles to high-flying higher vertebrates. During this difficult journey, birds have also developed different ways of flying, mainly gliding, winging and soaring. In addition, birds have evolved in different directions, including songbirds, game birds, birds of prey, wading birds, aquatic birds, seabirds, and flightless birds.

The Evolution of Birds:

1. A paraphylet, a paraphylet, from the alveolar saurodont of the primitive reptile of the primitive reptiles of the family, the age is probably in the middle of the Triassic, and the birds at this time are called the archaeomystis subclass;

2. The feathered protobird originated in the Late Triassic, and it has been known as a bird with feathers, so it is considered a bird, but many characteristics are still very similar to the bald dragon in the saurosaur Archaeopteryx than the original point of the protobird, but the two evolved separately;

3. There are twilight birds and flooded birds that belong to the beginning of the Tertiary period, and there are basically protruding chests, which are the birds we see, and then evolved into the ostriches and penguins of the flat-chested orders.

Birds are a paraphylette of the alveolar saurodonts of the primitive reptile subclass Primosaurus; It is probably dated to the Middle Triassic.

The birds at this time are called the Archaeomycetes, and the main representatives are Protocyanx and Archaeopteryx.

Archaeopteryx is generally believed to have originated in the middle and late Triassic, but the specimens found now are basically Jurassic (100 million years ago), and the feathered protobird originated in the late Triassic (100 million years ago) and already has feathers, so it is considered a bird, but many of the features are still very similar to the bald dragon in the saurosaurus. Archaeopteryx was more primitive than the protozoa, but the two evolved separately (i.e., not one evolved into the other), and it is now inclined that later birds evolved from protozoa.

By the Cretaceous period, the above-mentioned archaeothetic subclass had become extinct, and the present ornith subclass had evolved.

Among them, the extinct odontojaw still has teeth, which are basically aquatic, and there are dusk birds and flooded birds, and at the beginning of the Tertiary period, there is basically a protrusion of the chest, which is the birds we see; Subsequently, the flat-chested ostriches and penguins evolved.

The evolution of birds evolved from another branch of the early reptiles.

Archaeopteryx is perhaps the most prestigious prehistoric animal known. The only six fossil specimens were all found in Säänelenhofen in southern Germany. The Archaeopteryx is similar in size to a crow, but has teeth and long, reptilian tail feathers.

The legs are long, and the "elbows" of the wings have three claws, which can be used for climbing.

Relatives of birds. Bird's relatives include several bird-like dinosaurs, such as the Gallosaurus and the Bald, which may have been fast-legged predators. Archaeopteryx is the oldest known bird, living about 150 million years ago, and it has the characteristics of both a bird and a reptile.

Gradually evolved into birds.

Dr. Chadharji discovered strange fossils of chicken-sized animals from pre-Triassic rocks in the interior of Texas, USA. The small skull of this animal has a protruding beak in front of it, and small teeth in the beak, but the teeth in the jaw are gradually degrading, and the bone containing bone marrow has a large slit in it, similar to the airy bone of birds (meaning that there is no bone marrow in the bone and becomes a dangling bone).

Because because of the eggs, we have you.

It's that you just think it's good to compare the amount of uuuuu.

Is the hot water heater broken?!?

The ability of birds to fly is what we envy, from ancient times to the present, many people hope to have a pair of wings to take us soaring for nine days and ten earths, but in the course of evolution, it is almost impossible for us to have a relationship with wings dipped in, so only so many years only birds rely on their own ability to fly, so how did the wings of birds evolve? It turned out that the winged hands slowly degenerated, slowly growing feathers, and then slowly evolved and began to fly.

Wings we can find in many animals, chickens, ducks and geese have wings, but they can not soar in the sky like birds, according to scientific findings, on the way of evolution, birds have to turn to the sky in order to adapt to the environment and avoid natural enemies, because at that time in addition to the sky and land are occupied by large carnivores, and chickens, ducks and geese and other poultry in the past tens of thousands of years will still fly, because our ancestors domesticated, in order not to let it fly away, only slowly cultivated after the offspring will not fly, unlike the pheasants and ducks outside, they will fly.

In fact, it is wrong to say that we can't fly at all, since the plane was created, we have the ability to go to the sky, in the industrial revolution when the plane as the desire of the people, the wings of the plane made like a bird, the bigger the better, there is the predecessor of the current airplane, on the way to the sky, there are not only the prototype of the airplane, there are people tied to their own body full of fireworks and firecrackers all lit up to the sky, this person is called Wanhu, equivalent to the first human in history to explore the sky.

Now we travel often by plane, because it is fast and the danger factor is not as high as before, the previous plane only let the pilot go to the sky alone, but now the plane can carry hundreds of passengers, this is the power of science, it can also be said that human beings learn the power of humility, because we first learned to fly like birds, although the results are not satisfactory, but we also know that we must have enough power to have the ability to go to heaven.

According to Darwin's theory of evolution, the survival of the fittest is based on natural selection. So, then the evolution of bird feathers can be seen from the ancient dinosaurs, and now you can see that their wings have become lighter, probably because they are flying faster, cleaner, lighter and less effortfully in the sky, so they have become what they are now.

From the very beginning, it is necessary to avoid the pursuit of prey, and it will perform close jump gliding, and the longer forelimb feathers will help the glide to be retained, and it will continue to lengthen, and finally it can fly.

Birds' wings were originally featherless, but as food became scarcer, the wings slowly evolved into lighter feathers and hollow skeletons, and then became the current shape of bird wings.

Dinosaurs, which evolved from reptiles, stood and walked, and the front two legs degenerated, and these degenerated legs evolved into wings.

In the process of growing wings step by step, birds are designed to have sufficient food and avoid predators. In order to adapt to the environment, the ancestors of the bird feathered with keratin scales on their bodies, and their forelimbs gradually evolved into short wings, and later they were smaller, more muscular, and their bones were hollow, all for better flight.