What are the characteristics of spiders in writing?

1. Sensory characteristics of spiders Speaking of spiders, many people may feel disgusted and disgusted. I used to be like this. Seeing the spider is small and black, my scalp is numb and my legs are weak. But then I observed them carefully and found that spiders still have many advantages and are worth learning.

Spiders are very clever. They can weave the largest net with the least amount of silk. The net is like an air filter, which is used to trap insects with poor flying ability and can't see the filaments. Everyone should have heard such a folk song: "Little Zhuge Liang, sitting alone in the army account, set up a gossip array to catch flying generals." This folk song vividly describes the phenomenon that spiders spin webs to catch insects. I thought to myself: how happy it would be if people used the principle of spider web to design net doors and windows, and in summer, we would never be disturbed by unscrupulous mosquitoes again!

Spiders are very careful. Once I accidentally found a spider walking back and forth on the Internet. Slowly, the net becomes smaller and smaller. Alas, spiders are eating their own webs! Strange, this is something I have never heard of. With questions, I looked it up on the Internet and suddenly realized: Oh, it turned out that spiders are eating silk without mucus, and then spit out the silk with mucus to re-weave the web, thus catching insects. I can't help but sigh that Zhi is smart, careful and diligent!

Spiders are strong. One day, the thunder was very loud, and the raindrops as big as beans fell like beads with broken lines. I took shelter from the rain under one roof. At this time, I saw a spider, struggling to climb to the wall of the net torn by heavy rain. Because the wall is wet, it will fall down when it climbs to a certain height, only to see it climb up again and again and fall down again and again. . . . I stared at this spider, which had been defeated in many wars, and was deeply shocked by it. I am thinking: a little spider has such a persistent and tenacious spirit, and with such spirit, it will certainly succeed. This spider taught me a truth: as long as we persevere, everything will succeed!

Now, do you have a little affection for the little black spider? Do you think spiders are a little cute?

2. Write a composition about spiders. spider

Spiders are not beautiful in appearance, but they have a set of skills to kill pests for people.

When the hot summer comes, a spider moves in front of my house. Spiders mostly weave webs in the morning, round and round, one after another. It's like a skilled girl weaving a web. Soon, it was woven into an octagonal kite-shaped net. After weaving, it was obviously a little tired, so it hid aside to rest and watch, waiting for flies and mosquitoes to trap itself.

After a while, a fly bumped into a sticky and strong net. It struggled desperately, but it was too late. The spider saw it and tried to escape! That's impossible. Spiders are in a hurry to eat. First, spray liquid on flies to soften them, and then eat slowly.

The sky has changed, and I feel a little puzzled, because the horizontal net will become a vertical net? How did they know it would rain? What is the division of life of spiders? I saw the weatherman busy observing the weather, the mother teaching the children skills, and the hunters busy catching insects with nets ... There are spiders in different jobs. I miss the happy life here!

Spiders are ugly, but they are "heroes" who catch mosquitoes and flies. They are indeed friends.

There is a big tree in front of my house. It is green and tall, just like an open green velvet umbrella. When the wind blows, its green leaves seem to be the hair of a girl fluttering in the wind.

One morning, I saw a black spider crawling around among the leaves, weaving an octagonal web. I didn't know this net was used to catch mosquitoes. I thought it was used to eat leaves and wanted to destroy the environment. So I took a long stick and broke the cobweb. I saw the spider running left and right, magically weaving a strong web, shining in the sunlight. I broke it easily with a stick again. In this way, I broke its net again and again, and it painstakingly weaved a magical net again and again, as if laying a gossip array. I have no choice but to go home.

When I got home, I told my mother what had happened. My mother smiled and said to me, "Spiders are beneficial insects. They don't eat leaves. The nets they weave are used to catch mosquitoes! " "Oh, I suddenly understood that I really regret breaking the spider web. Hey! I'm sorry, spider. I see spiders, spiders, spiders, like a skilled girl, weaving one web after another. I think it is smart and tenacious. I admire it. I want to learn the tenacious spirit of spiders!

Today, I helped my mother go shopping. Inadvertently, I saw a dark thing in the corner of the shop. I stood up and went to have a look. Unexpectedly, it actually moved. Ah! It turned out to be a spider. Let me have a closer look. Oh, it's catching moths. I decided to see how spiders hunt. I saw spiders crawling towards moths. Not far away, it suddenly stopped, then spit out a silk from its tail, and then climbed to one side, entangled the wings and legs of the moth, wrapped around it. The moth struggled desperately. Although she broke free from the spider web and fell off the wall, it didn't help. The spider immediately jumped to the ground and found the moth. Then he bit the moth with his mouth. Oh, I see. Spiders should be injecting anesthetics into moths now. After a while, I saw the moth lying on the ground, motionless, and the spider could ignore it and eat it with relish.

Later, through observation, I also found that spiders feel by the vibration of their webs, and they prey by weaving webs, and spiders only eat live animals, not dead insects. Spider spinning has a great significance in his life besides hunting, which is the continuation of life.

There is a red spider in Africa, which is tightly wrapped in egg bags with sticky spider silk. The female spider guards the egg bag all day, waiting for the birth of the baby spider. About a month later, the egg bag cracked a small hole and the little spiders climbed out one by one. These little spiders are born to eat. The mother spider laid a dozen food balls, enough for the little spider to eat for three days. Three days later, the little spider grew up a lot and began to shed its skin for the first time. At this time, the mother spider gathered the little spiders together with her spider thread and then lay on them. The hungry little spider scrambled to climb on the female spider and began to hesitate. But I don't know which little spider took a bite first, and my mother's skin was bitten. Other brothers and sisters smelled blood, a bit like their mother. After a while, the mother's body was covered with children, and each child had a sharp straw. Hundreds of straws pierced the mother's epidermis and stabbed her body. The mother did not move, so that more than 100 children sucked the liquid in her body and fed it again and again. The female spider's body is enough for the young spider to eat for four days. Four days later, the little spider grew bigger and bigger, and the mother spider had been eaten up. The female spider not only feeds her children, but also awakens their hunting nature with her own juice. The female spider willingly served as her child's first prey. The child learned to hunt by eating his mother. Only in this way can the little spider survive in a harsh environment.

People know that female spiders eat male spiders and call her' black widow'. But people don't know that female spiders eat male spiders not only to supplement their own nutrition, but also for the baby spiders to be born soon. I think both male and female spiders know this. They gave their lives for their children, and it was so painful for the female spider to eat the male spider.

4. Writing Spider Composition Spider

The day before yesterday, I was lucky enough to find a little spider while washing my hands. So I grabbed it without hesitation and put it in a box.

When I moved it from the outside to the "box world", it was still very uncomfortable with this new environment, so it tried to "escape" from this "prison" several times and took the opportunity to slip away when I was not looking. Unfortunately, every time I can "catch it" intact. Finally one day, it stopped tossing and began to settle down. It was decorated here (that is, a lot of nets were woven). I deliberately caught a live moth in the kitchen. After I put the moth in the box, the spider approached it unhurriedly, but it didn't notice the danger lurking around (such a situation seems to have been seen in Animal World). Then, the spider jumped forward and the moth became a delicacy in the spider's mouth. But all this surprised me. Instead of eating the moth, it took it away by itself.

After careful consideration, I understand that although it has changed the living environment, its living habits are not easy to change! Finally, I put it into the embrace of nature. I hope it can catch more pests.

5. What are the cruel habits of spiders? When it comes to spiders, the most common sense is probably their sex life.

Some female spiders will not hesitate to eat male spiders after mating, which makes the life of this class mysterious, both creepy and fascinating. I'm afraid the reason is that human beings project their secret sexual desires in animal sacrifice and mating: sadism and abuse, control and submission, * * * and death.

When a tarantula is courting, she first weaves a small fine net, scatters * * on it, and then grabs * * with a specially constructed claw and approaches the female spider affectionately. Before approaching the female spider, the male spider kept waving his feet in the distance. If the female spider lies still, the male spider can mate near the female spider. The male spider sends * * into the seminal vesicle of the female spider with his feet.

Once mating is completed, it will be eaten by the vicious female spider. Australia is home to many dangerous animals. Spiders are rampant in that area. Every year, about/kloc-0.00 people are killed by spiders, such as black widow, brown spider and funnel spider, which can easily kill an adult.

6. I want to write a composition called Spider. What are the habits, hobbies and habits of spiders? Predation is a habit 1: (1) Immobilization method: when spiders prey, they paralyze each other with their fangs, secrete saliva to dissolve their prey, and then suck slowly, without missing a bit.

(2) Homemade fresh-keeping bags: Spiders are afraid of light and often make webs in transparent and ventilated places. Spider silk can be used not only to trap prey, but also as a fresh-keeping bag. The spider wrapped the leftover food in a net for the next time.

(3) cleanliness: spiders clearly divide the places where they eat, sleep and pull things. Domestic spiders generally use cages as garbage stations, urinate in them and throw food scraps. (4) the appetite is extremely delicate: spiders have a strong sense of territory and should be raised separately.

They only eat one or two meals a month and can fast for two months at most. The food is mainly insects, such as crickets and Cao Meng. As long as you put a wet sponge in the cage to replenish water, you can raise it to adulthood (about seven years) without changing the cage.

Habit 2: Spiders are small animals that people often see in their daily lives. The big one can be 10 cm long, and the small one is only 1 mm ... They are various and widely distributed.

It is known that there are more than 22,000 species of spiders in the world, and there are at least 3,000 species in China. We can find their clues in forests, fields, grasslands, watersides, under rocks and indoors. Even spiders live underground and on water.

Spiders are ugly in appearance and their bodies are basically divided into two parts. The smaller part in front is the combination of head and chest. They can have one, two, three or even four pairs of eyes, and some even have no eyes.

These eyes are also divided into sun eyes and night eyes, which are useful when going out for activities during the day and at night. There are four pairs of flexible strides on the ventral surface of the head and chest.

The back of the spider's body is an enlarged abdomen, which is connected with the front by a short handle. The biggest difference between spiders and other animals is that there are three pairs of spinnerets at the back end of the abdomen, from which spider silk is drawn. Spiders are closely related to humans.

In Li Shizhen's Compendium of Materia Medica, it is recorded that spiders are used as medicine to treat ulcers, proctoptosis, sores, body odor and other diseases, and it is also recorded that "this insect establishes a class, and it is punished when things are touched, and it is punished by ambition", and even the name of the spider is pointed out. From this, we also know that spiders can not only be used as medicine, but also catch insects and eat live insects. The habit of spiders preying on fresh meat is the basis for us to regard spiders as natural enemies and eliminate pests in the field today.

At present, this work has been widely carried out in many provinces in China. According to preliminary statistics, there are more than 50 species of spiders in cotton fields and more than 40 species in rice fields. They prey on a variety of pests, such as plant hoppers, leafhoppers, aphids, spider mites, locusts and other important pests, and eat a lot. It is observed that a spider named Tetragnathus can eat 30 leafhoppers and planthoppers every day. Generally, a spider also eats 3-5 pests every day.

Spiders reproduce very quickly, which is particularly advantageous. In general, the natural number of spiders in the field can be as many as thousands to tens of thousands per mu of rice fields, and in many cases it can even be as high as hundreds of thousands per mu. They are also very fertile.

As we know, spiders are oviparous animals, and each female spider can lay 100 eggs on average. Okumo produces more, but little spiders. For example, the largest spider can lay 3000 eggs.

Spiders lay their eggs in one or several egg bags made of silk, or pull out silk to cover the eggs after laying them. Egg bags can be placed in different places, but they are all places that the female spider thinks are safe. For example, some spiders live in caves, and their egg bags are placed in caves. Some spiders hang their egg bags on their own nets or on plants near their hiding places so that they can take care of them at any time.

Some kinds of spiders just carry egg bags wherever they go, some with their mouths, some with silk around their bellies, and some with their chests. The eggs hatch into young spiders soon after they are in the egg bag. Young spiders often stay in the egg bag for a while before coming out. If it happens to be winter, they simply spend the winter in the egg bag until the next year.

After molting several times, the young spider grows into an adult. Interestingly, spiders that crawl around with egg bags hanging on their bellies, when their young spiders hatch from the egg bags, they have to live on their backs for a while before they can live independently.

This is also an instinct for spiders to protect their young spiders. Spiders weave webs to catch insects. Everyone is familiar with it. In fact, some spiders don't weave webs.

For example, the familiar tarantula is like this. Although these spiders don't make webs, they are also good at hunting. They are sharp-eyed and quick-moving. Find the prey, sneak up to it, pounce on it while it is unprepared, catch the small insects in lightning speed, bite them with their claws in the well, and then expel the venom, poison them and eat them.

Spiders who weave webs, if we look closely, we will find that the webs woven by different kinds of spiders often have different shapes and patterns. Generally speaking, cobwebs can have five shapes. The first is the circular net that we often see, which is called gossip net. The spider web is on a plane, and the spider silk is arranged radially from the center to the periphery, with many horizontal lines in the middle. The second type is called funnel net, which is shaped like a funnel and has a silk tube next to it for spiders to go in and out when they are active on the net.

The third kind of net is triangular, which is called triangular net. The fourth type is called Gai Hua net, which weaves filaments into layers and arranges them on a plane, while other filaments extend irregularly in all directions.

The fifth kind of net is irregular and extends in all directions, which is called irregular net. No matter what kind of net, catching insects is very effective.

Every time a small insect hits the net and gets stuck, the spider will quickly climb over and catch it. If the prey is still struggling on the internet, the spider will fall from the abdomen and discharge a bunch of white silk thread to tightly wrap the prey.

Spider stings are the front appendages of the head and chest. They have poison glands in their bodies, and the venom they secrete is very powerful. Needless to say, it is an insect, and some spiders can kill cows. For example, the bird spider is an Okumo with a body length of 10cm. It is dark brown and covered with a layer of fluff. It has long and powerful feet, is good at jumping, can cross people, make holes in the soil, come out at night to prey on insects, and sometimes it can prey on birds in trees.

In particular, they have the structure of a buzzer, which can make a sound. The venom secreted by their poison glands,

7. Composition describing the appearance of spiders Speaking of spiders, an ugly image will probably emerge in everyone's mind: eight curved and segmented legs, a spherical abdomen, and a pair of jaws with more or less toxins ... This image often makes people who don't know much about spiders think that it is a pest. However, is this the case?

I have observed spiders for a while and found that most spiders are not pests, but they are very beneficial to human beings! They caught a large number of pests in their own unique way. As far as I know, there are two ways to catch insects: the first is the "waiting for the rabbit" method. It first weaves a gossip-shaped sticky net with silk in its belly, and then hides in a corner that is not easy to be found, waiting for the arrival of flying insects. If some unlucky flying insect hits the net, its body will get stuck and can't move. At this time, the spider will quickly climb over, bite the prey and inject "anesthetic" into its body to turn the internal organs of the prey into liquid. And finally? Dinner, of course! I have only seen the second method of catching insects once, and I don't know much about it. This method of catching insects is relatively simple, and there are not many prey caught: it will pounce on its prey like a beast. At the speed of spiders, it is ok to catch some reptiles that can't fly, but what about those flying insects? Will greatly reduce the discount!

In addition, spiders are also excellent meteorologists. On a sunny day, it lazily basks in a large horizontal net. Of course, if it can stick to an insect, it will be an unexpected gain for spiders. On rainy days, spiders will leave the horizontal web and weave a vertical web in another shelter. When you come back after the rain clears, you will find that the horizontal net has been smashed by raindrops, but the vertical net is intact. According to this phenomenon, we can know that it will be a sunny day when spiders make horizontal webs; When spiders spin vertical webs, it will rain.

After this introduction, you should know something about spiders! In fact, my observation is only one-sided, and spiders also have pests. Do you want to know? Please use your head and observe more. If anyone knows more about spiders, please communicate with me to enrich our knowledge.

8. Composition of Spider When you step into the gate of Spider House, there is a giant "spider" ready to move! Because a sensor is installed on the ceiling of the entrance to the Spider Pavilion, whenever someone enters, the robot spider hanging high in the center of the pavilion will start, just waiting to "run away" to scare you when you visit.

Speaking of it, spiders are well-known "wrists", and some places are more magical than humans! According to scientists' estimation, the spider "family" has lived on the earth for at least 380 million years and has evolved into 105 families and170,000 species. If the members of the spider "family" can be evenly distributed all over the world, there must be spiders within every 1 square meter.

According to the survey, the rice fields in the south of China are the "downtown areas" of the spider world, with more than 3 15 heads per square meter. In northern China, there is also a folk proverb: "If you don't clean the house for three days, there will be cobwebs."

So what do we know about spiders? Of the 6.5438+0.7 million species of spiders, only 34,000 are known to human beings. Look, the reporter made a joke as soon as he opened his mouth: "Spider is a very special kind of insect."

The commentator immediately corrected: "Wrong, spiders are not insects. Although they all belong to the phylum Arthropoda, spiders belong to the class Arachnoidea rather than Insecta.

Spider's body is only divided into two parts: head and abdomen, with eight legs; The body of this insect is divided into three parts: head, chest and abdomen, and has six legs. The friendship between spiders and insects is not only profound, but also "enemies". Spiders can devour 80% of insects. When it comes to kinship, scorpions are close relatives of spiders.

If you haven't dated the spider family, you don't know the following-the spider family has the ability to challenge all kinds of extreme living environments on land, such as branches, forests, flowers, mountains, caves, coastal areas and even deserts, and some spiders even live in fresh water. The smallest spider in the world lives in the deciduous layer, with a body length of only 1 mm, which can only be really seen under a microscope.

The biggest spider in the world is Grice, a bird spider. Grace is a giant in biblical stories. He lives in the tropical rain forest of Latin America. His length is 65,438+00 cm, his weight is 65,438+035 g, and his limbs can stretch up to 25 cm. Frogs, lizards and even small mammals can be reduced to its food. ◆ Special note: The exhibition area of Spider Pavilion is about140m2, which is divided into five exhibition areas: spider overview, spider experience, mating and reproduction, web weaving and spider venom, and 28 families 105 families of spiders are displayed.

There are specimens, models and living spiders in the museum for viewing, and there are graphic display boards, video films and voice interpreters to explain the relevant knowledge to you. Grice is the biggest spider. Our reporter Zhang Long feels that spiders might as well accept the invitation of the spider family to see, hear and perceive the world from the standpoint of spiders-spiders with special senses have eight eyes, which are reasonably distributed around their heads.

Although most spiders can't move their eyes and focus accurately, they can look around, and they also have a special skill: "detecting" polarized light in sunlight. So the spider sees a twisted but infinite world, and can position itself according to the change of the position of the sun.

The nature of bisexual spiders is that they would rather hide than fight, and they will never bite unless they have to, but sometimes they can become their biggest natural enemies-there is a spider with long fangs that specializes in eating spider eggs or young spiders, not to mention adult spiders and spouses nearby. The growth of a spider is a very painful thing, because it has to go through a life-and-death molting process.

The spider family's life is so full of contradictions that it can only be explained by "dual personality"-both fragile and brave. Spider love Some kinds of male spiders are overbearing. After mating, they will break some tentacles or secrete some substances to block the seminal vesicle of female spiders to ensure that no other male spiders can follow in their footsteps.

In contrast, the female spider's love is much more selfless. They firmly protect their babies with egg bags. For example, in the first three weeks, wherever she went, the wandering spider's mother put the egg bag in her mouth, and she didn't eat or drink. The little spider died soon after hatching.

Spiders have been spinning silk all their lives. In addition to cobweb traps, the "finished products" of spider silk also include tablecloths, beds, cradles, telephone lines and safety belts. Frame wires and warps can support spider webs, bonding wires release "super glue", binding wires are used to bind and reinforce prey, dragging wires can make spiders jump even higher, and multi-purpose wires can attract prey, cover themselves, warn intruders and weave sleeping bags.

In terms of comprehensive performance per unit area, there is no rayon in the world that can compare with spider silk. If there is Spider-Man, his weapon really only needs to be as thick as spider silk.

◆ Special note: There are many interactive games in Spider House. Jigsaw puzzles, guessing prey, identifying spider silk and weaving spider webs can help you understand the world and life of spiders. The staff are nervously arranging the exhibition. Our reporter Zhang Long took photos of the Spider Exhibition, which made everyone who participated in the preparation of the Spider Pavilion feel "benefited a lot", not only because of the Spider Pavilion itself, but also because of the knowledge and enlightenment it brought.

In order to prepare for the Spider Museum, the staff of Shanghai Science and Technology Museum searched for experts all over the country and only found a real spider scientist. From the perspective of bionics, the research value of spiders is extremely high. In contrast, although western countries have always been afraid of spiders, they know much more about spiders than we do.

According to Qian, deputy secretary of the Party Committee of Shanghai Science and Technology Museum, many things told by the Spider Museum are the research results of the Smithsonian Institution of the United States. What's more commendable is that there is an invisible bridge between the research institute and the museum: not only researchers focus on scientific research and publish papers, but also some people show their scientific research results to everyone in time. We should also consider avoiding rigid preaching and guiding visitors to see, listen and feel in plain language; At the same time, there must be social philanthropists like Mr. Beling, an American who sponsored the exhibition, who are willing to invest in popular science.

Qian said that he believed that the Spider Museum would open up a school-running idea of a science and technology museum and introduce more Mr. Behring into the science and technology museum. This is the greatest wealth.

9. 600 words about spiders (People's Education Edition) Speaking of spiders, an ugly image will probably come to everyone's mind: eight curved and segmented legs, a spherical abdomen, and a pair of jaws with more or less toxins ... This image often makes people who don't know spiders think it is a pest. However, is this the case?

I have observed spiders for a while and found that most spiders are not pests, but they are very beneficial to human beings! They caught a large number of pests in their own unique way. As far as I know, there are two ways to catch insects: the first is the "waiting for the rabbit" method. It first weaves a gossip-shaped sticky net with silk in its belly, and then hides in a corner that is not easy to be found, waiting for the arrival of flying insects. If some unlucky flying insect hits the net, its body will get stuck and can't move. At this time, the spider will quickly climb over, bite the prey and inject "anesthetic" into its body to turn the internal organs of the prey into liquid. And finally? Dinner, of course! I have only seen the second method of catching insects once, and I don't know much about it. This method of catching insects is relatively simple, and there are not many prey caught: it will pounce on its prey like a beast. At the speed of spiders, it is ok to catch some reptiles that can't fly, but what about those flying insects? Will greatly reduce the discount!

In addition, spiders are also excellent meteorologists. On a sunny day, it lazily basks in a large horizontal net. Of course, if it can stick to an insect, it will be an unexpected gain for spiders. On rainy days, spiders will leave the horizontal web and weave a vertical web in another shelter. When you come back after the rain clears, you will find that the horizontal net has been smashed by raindrops, but the vertical net is intact. According to this phenomenon, we can know that it will be a sunny day when spiders make horizontal webs; When spiders spin vertical webs, it will rain.

After this introduction, you should know something about spiders! In fact, my observation is only one-sided, and spiders also have pests. Do you want to know? Please use your head and observe more. If anyone knows more about spiders, please communicate with me to enrich our knowledge.

Hope to adopt.