Why do birds have wings and what birds don t have wings?

Because it's a bird, it's going to fly.

Kiwi. Kiwi is the national bird of New Zealand and the national symbol of New Zealand. The kiwi gets its name from its high-pitched call "keee-weee". The kiwi is also known as the kiwi because it has no wings and therefore cannot fly.

The kiwi is small and stubby, with a long, pointed beak, strong legs, and hair-like feathers, and is unable to fly due to vestigial wings. Kiwi birds are easily frightened, and most of their activities take place at night, so it is not easy to observe their ecology. The nostrils at the end of the long beak can sniff out the location of the insect and prey on it.

Habits. A lazy kiwi that sleeps up to 20 hours a day. Kiwi are shy by nature and are mainly active at night. They have a keen sense of smell, and can even smell insects and smells in the soil at a depth of less than 10 centimeters.

They are considered omnivores. The main food includes earthworms, insects, spiders and other invertebrates in the soil, and they also feed on eels and freshwater crayfish and amphibians in river streams, as well as fruits.

The kiwi's main breeding season is from June to March, and like the albatross seagull, they are monogamous and can be married for up to 20 years, even if the spouse dies. Kiwi will dig burrows to build nests, be more hidden from attacks, and summon mates to mate at night.

The only bird in the world without wings, the kiwi, the national bird of New Zealand.

Birds evolved from small sauropod dinosaurs, ancient reptiles, and their two forelimbs gradually turned into wings in order to adapt to their living environment. The bird's wings are constantly flapping up and down, creating a huge resistance to downward pressure on the air, causing the bird to fly forward quickly. <

The reason why small birds have wings is that birds evolved from small sauropod dinosaurs, ancient reptiles, and their two forelimbs gradually became wings in order to adapt to their living environment. The bird's wings are constantly flapping up and down, creating a huge resistance to downward pressure on the air, causing the bird to fly forward quickly.

Birds are freedom-seeking animals, and they fly freely in the sky with beautiful wings every day. And in life, a bird without wings is like a person without oxygen, and it cannot live. And I am a bird without wings, very eager for a pair of white wings, very eager to be free.

Since I was in first grade, my. Freedom vanished without a trace. At home, not only do the homework assigned by the teacher, but also complete the homework of the tutorial class as high as a hill.

My mother used to sit next to me and mutter, "The words should be written properly, the waist should be straight, the brain should be used, and the heart should ......be memorized.""Who knows, my heart is like a cute bird flying to the blue sky.

Not to mention in school, we are faced with exams after exams. A small test in three days, a big test in five days, is really "a test, a test, a test, a teacher's magic weapon; Points, points, points, the lifeblood of the students". When the test papers were handed out, some of the students were smiling and praising the benefits of the exam everywhere; Some of them had sad faces, sighing at the sky and ......At this time, the campus is full of joy and sorrow.

I was the only one who stood out from the rest, sitting in my seat and looking up at the boundless sky. I know that at this point my heart was taken away by those naughty birds. Before I knew it, I had risen to sixth grade.

Teachers and parents often whisper to me in my ear, "You must study hard and strive to be admitted to Education City, you know?" I nodded my head in understanding, but then I asked myself, confused

Why should I be admitted to Education City? Could it be that Education City is a beautiful sky? Although I don't understand, I don't want to pursue the answer, because the "education city" in the mouth of adults has become my goal.

Somehow, I felt like a bird controlled by others, without my own ideals, without my own goals, and only at the mercy of others.

That blue sky was so far away from me, so far away ......And I, a little bird without wings, will never be able to fly into the arms of that blue sky.

Small birds can fly because they have light feathers, light bones, short rectum, muscular chest and wings, streamlined body, constant body temperature, etc. Small birds are also called birds, birds, there are many species, some can fly, some birds have degraded wings and cannot fly. The following is a detailed introduction to why birds fly, and those who are interested in the body structure of birds can read below.

1. The body is streamlined: when the bird flies, it can reduce the resistance of the air, and it can fly faster and higher.

2. The body surface is covered with feathers: the feathers of small birds are divided into down feathers and normal feathers, which can play a role in heat preservation in flight and positive feathers play a balancing role.

3. Light bones: The bones of the bird are light, the bones are hard, the bone pieces are thin, and some bones are hollow, and there are air sacs in them to help breathing.

4. Muscular and short rectum: the bird has developed pectoral muscles, large power, can pull the fan of the wings, has a short rectum, fast digestion speed, and reduces body weight.

By reading the above, we can know why birds fly and how birds can fly is related to their body structure. Birds evolved from dinosaurs, survival of the fittest, and in order to adapt to the environment, the forelimbs became wings. Some species of small birds have wings but cannot fly, probably because of wing degradation, bulky body, etc.

Hello dear! Quietly <>

The prehistoric Argentine eagle lived in the late Miocene, about 6 million years ago, and fossils of the Argentine eagle were found from the foothills of the Andes Mountains to the Pampas. Agan and the Giant Eagle will use the winds blowing from the slopes of the Andes and the updrafts of the pampas to help it fly, soaring through the air while also looking for prey, and once it finds its target, it will swoop down from high altitudes and pounce on its prey, killing it; When it is not suitable for flight, it will also use its strong legs and large claws to chase or ambush small animals on land. Scientists believe that it, like vultures, also eats dead animals.