Common sense about animals

1. Classic tips about animals ~ It better be interesting.

Why do pigs love to dig mud? Answer: Modern pigs evolved after thousands of years of domestication. Pigs like to arch the earth wall with their mouths, not to find food, but just a habit inherited from the wild times. Why do birds have no teeth? Answer: We see that birds have horny mouths and no teeth in their mouths. This helps to reduce their weight and facilitate their flight. In addition, in the digestive tissues of birds, there are crops and sandbags for storing grains, which can help grind food and make up for the lack of teeth. How to distinguish poisonous snakes from non-poisonous snakes? Answer: 1, poisonous snakes generally have a big head and a thin neck, a triangular head, a short and suddenly tapering tail, and bright body patterns. 2, non-poisonous snakes generally have a blunt head, a thin neck, a slender tail, and no obvious body surface pattern. 3. The most fundamental difference between poisonous snakes and non-poisonous snakes is that the tooth marks of poisonous snakes are single-row, while those of non-poisonous snakes are double-row. Why do crabs crawl sideways? Answer: A crab has four pairs of feet, commonly known as "legs". Because the joints of each "leg" can only bend downward, but not forward and backward, when crawling, it must first grasp the ground with the fingertips of one foot and then push its body with the other foot, so it will only crawl sideways. In addition, because the length of each foot is different, its crawling direction is always a little oblique. Why do chickens often eat sand? Answer: Chickens have horny beaks and are suitable for pecking at feed. The chicken has no teeth in its mouth, and the feed enters the esophagus without chewing. The stomach of chicken is divided into glandular stomach and muscular stomach. The glandular stomach is small and the digestive glands are particularly developed. After being soaked in digestive juice in glandular stomach, feed quickly enters muscular stomach, which is a unique digestive organ of chicken. The stomach wall is particularly developed and consists of thick muscles, and the inner surface of the stomach is covered with a solid horny membrane. Answer: Because fish's skin contains a mucous gland, it can secrete something fishy (called trimethylamine). When this thing is emitted into the air, we can smell the fishy smell.

2. Knowledge about animals

Tortoise: 1) The circadian rhythm of tortoise is slower than that of other animals! Animals with slow circadian rhythm live longer! (2) The tortoise's metabolism is very slow! And the slower the metabolism, the longer its life! (3) Turtles have amazing hunger and thirst tolerance! (4) The sexual maturity of turtles is very long! Generally, the shorter the sexual maturity of animals, the shorter the life span! Like rats.

(5) The tortoise has the ability of long-term dormancy. Like hibernation.

Dragonfly: (1) Dragonflies fly very fast, some of which can reach 100 kilometers per hour, and can also stay in the air for a short time. It can't change its direction flexibly when flying forward, so it has to hold its body steady and turn.

When resting, the wings are still open, that is, the wings can't be folded, so there should be considerable space to stay, mostly on the branches or leaves. (2) The mating of dragonflies also occurs in flight.

Male dragonflies grasp the neck of female dragonflies with hooks at the end of abdomen; The female dragonfly's abdomen bends from bottom to front, connecting the reproductive hole to the storage organ under the second abdominal segment of the male dragonfly, and then the male dragonfly is fertilized. Female dragonflies lay eggs in the water, and most of them touch the water with their tails when flying, so as to expel the eggs.

Our common so-called "dragonfly water" is its performance when it lays eggs. Bat: Bats are truly weak eyesight. It flies at night by its own sound waves (ultrasonic waves).

As a result, scientists were inspired by bat's ultrasonic navigation and predation of insects, and invented radar for modern science and technology and aerospace military. Kangaroo: Kangaroo can control the growth and development of the fetus. Humans and other animals can't do this. Only kangaroos can do it.

Snakes: poisonous snakes kill enemies through venom, while non-poisonous snakes suffocate enemies through entanglement. Gecko: When in danger, it will throw off its tail to protect itself! That tail is specially used to get rid of it and protect itself.

3. Knowledge about animals

The dog's vigilance is unusual. Its nose is so sensitive that it can smell things three miles away. When eating, it always lowers its head to smell. It also has a pair of ears. Whenever it hears a special sound, its ears will always stand up and listen carefully to the sound outside! So people raise it to watch the gate. It is a loyal friend of human beings.

This puppy has a big mouth and a row of white and sharp teeth in Zhang Kuan. It can kill a big mouse in one bite!

This puppy has strong limbs. It runs fast. It can run two or three miles a minute!

The puppy's eyesight is not very good, and he can only see a distance of about a mile. So, why can it see clearly? Mainly look at its nose.

The dog's claws are very sharp, and it won't be long before it can dig a big and round hole.

When the puppy was born, its hair was brown. When it grew up, it was no longer brown, but became dark yellow.

This puppy has a very gentle personality. If you treat it well, it will use your head and legs, as if it were coquetry to you; But if a stranger comes to his home, he will still bark and even jump on you and bite you.

It's summer, and on a hot day, dogs can often be seen sticking out their tongues instead of sweating. The reason is simple, that's because the dog's sweat holes grow on the tongue.

Puppies are really loved by everyone and bought with real skills.

Flower dog chased pheasants, rabbits and so on with his father when he was a child, so he developed a good climbing skill. Once a group of wild goats appeared in the mountains, and my father and I set off with guns and dogs. But the day is almost over, and our father and son still have nothing. Suddenly, Monkey King, Monkey King and Wang Dasheng cried. My father walked over and said confidently, "After the flowers, smell the footprints of this wild sheep. I believe you can catch it. Go ahead. " After listening, the dog disappeared into the Woods. After about ten minutes, the dog barked again. We chased into the Woods and ran for a while before we saw an adult wild goat fighting with a dog. That wild goat is really "old bones". It always comes at us, and my father and I are forced to step back. You know, dogs are generally loyal. As long as people leave the forest, it always leaves the forest with others. But Flower Dog is also smart! He knew that his father was testing him, because he didn't shoot, so the dog kept biting him with the sheep. When the wild goat turned his head to the dog, the dog jumped up and bit the wild goat's throat with sharp teeth. I saw the wild sheep waved and fell to the ground with a bang. But it still struggled desperately. When the dog bit it, it wouldn't open its mouth until the wild sheep couldn't move any more. Our father and son happily picked up the wild goat and walked home. The dog barked proudly.

Another time, my father took me hunting in the mountains, and suddenly a badger hole appeared in front of me. Father asked me to stay at the mouth of the cave with the dog. Then my father picked up some straw, went to a hole, stuffed it into the badger's hole and lit a fire. The badger couldn't stand the strong fireworks and ran away from me. In order to get my father's praise, I picked up a branch and pounced on the badger. But badgers are tough. He looked at me and probably thought I had no problem, so he yelled at me. My heart was pounding, and just when I was at my wit's end, the dog pounced on me, biting the badger's tail and biting it tightly. The badger jumped up and screamed in pain, and suddenly the dog was thrown away. The dog got up without fear, jumped on it and bit the badger in the stomach. At this moment, I saw that brave dog immediately threw the badger down, bit the badger's stomach with Kouga and pulled out his intestines. The badger was in great pain and fought back with his sharp claws. The dog's nose was scratched. When the two animals were fighting again, the father came and shot the badger hard in the head. The badger stopped moving. Flower dog also fell down, licked his nose with his tongue, stood up as usual and posed as a winner.

Later, dogs were not allowed in the local area. Dad thought about it for several days and finally sent the dog to the forest protection team. Let it contribute to the forestry of the motherland.

Although I lost such a "good friend", I still miss it.

short review

From the author's wonderful description of the two scenes of the dog beating the wild goat and the badger tearing, we can see that the little flower dog is really as sensitive, good at running and fierce as written at the beginning. The beginning is closely connected with the central part.

The paper describes the fighting scenes between dogs, wild goats and badgers, which is exciting. The cunning of the wild goat sets off the dog's cleverness, and the badger's fearlessness sets off the dog's fearlessness. The dog's killing action is also very vivid. For example, the dog always bites the sheep. As soon as the sheep turns around, the dog "jumps up and bites the throat of the wild sheep with sharp teeth". How clever. The endings of the two battles are also well written: "Hua Gou proudly barks" and "poses as a winner". Describing dogs so vividly shows the author's love for dogs.

4. Knowledge about animals

The concept of animals Animals are a large group of multicellular eukaryotes, called the animal kingdom.

Generally, inorganic substances cannot synthesize organic substances, and only organic substances (plants, animals or microorganisms) can be used as food, so it has different morphological structure and physiological functions from plants to carry out life activities such as feeding, digestion, absorption, breathing, circulation, excretion, feeling, exercise and reproduction. Zoology classifies animals with the same or similar characteristics into the same category according to their shapes, internal body structures, characteristics of embryonic development, physiological habits and geographical environment, and becomes chordates and invertebrates.

Animals can be divided into aquatic animals and terrestrial animals according to whether they are aquatic or terrestrial; According to whether there are feathers, they can be divided into feathered animals and featherless animals. In addition to the above two features, we can also use other features to classify.

Animals also have a variety of classification methods. By dissecting different animals, we can find that some animals have thorns in their bodies, while others have no thorns. According to whether there are thorns in their bodies, we can divide all animals into vertebrates and invertebrates.

Note: people also belong to animals, and they are advanced animals. [Edit this paragraph] The history of the origin animal kingdom is the long course of animal origin, differentiation and evolution.

It is a process from single cell to multi-cell, from invertebrate to vertebrate, from low level to high level, from simple to complex. The earliest single-celled protozoa evolved into multicellular invertebrates, and gradually appeared in the phylum Sponge, Coelenterata, Platforms, Newtonian, Linear, Annelida, Mollusca, Arthropod and Echinoderm.

Vertebrates evolved from echinoderms without spines. The earliest vertebrate was cirrhosis, and the upper and lower jaws appeared in the evolution process, from aquatic to terrestrial. Amphibians were the first vertebrates to land.

Although amphibians have been able to go ashore, they still have not completely got rid of the shackles of the water environment. They must lay eggs and breed in the water to spend their childhood. From primitive amphibians to reptiles.

Reptiles can lay eggs and hatch on land, completely get rid of dependence on water and become real terrestrial animals. Reptiles and their predecessors belong to warm-blooded animals, and their bodies will become cold and stiff. At this time, they have to stop their activities and enter a dormant state.

Then reptiles evolved into birds, into warm-blooded animals, and finally evolved into viviparous mammals, without entering a dormant state, and humans are the most advanced animals among mammals. [Edit this paragraph] There are about 6.5438+0.5 million known animal species.

It can be divided into invertebrates and vertebrates. Scientists have identified more than 46,900 species of vertebrates.

Including carp, yellow croaker and other fish animals, snakes, lizards and other reptiles, as well as familiar birds and mammals. Scientists have also discovered about 65438+300,000 species of invertebrates.

Most of these animals are insects and most of them are beetles. In addition, animals such as slugs and sponges belong to invertebrates.

1. Invertebrates include protozoa, flatworms, coelenterates, echinoderms, arthropods, mollusks, annelids and linear animals. So invertebrates account for more than 90% of all animals in the world.

2. Vertebrates include fish, amphibians, reptiles, birds and mammals. The characteristic of vertebrates is that the spine consists of vertebrae (the notochord is only visible in the embryonic stage).

The spine protects the spinal cord, and the spine and other bones form the unique endoskeleton system of vertebrates. There is an obvious head, and the front end of the dorsal neural tube differentiates into the brain and other sensory organs, such as eyes and ears. The brain and sensory organs are concentrated in the head, which can enhance the animal's induction to the outside world.

The body is covered by epidermis and dermis. The skin has glands, and the skin of most vertebrates has protective structures such as scales, feathers and body hair.

There is a complete digestive system, tongue in the mouth, most teeth, liver and pancreas. The circulatory system includes the heart, arteries, veins and blood vessels.

The excretory system consists of two kidneys and a bladder. There are endocrine glands, which can regulate body function, growth and reproduction through hormones.

(1) Fish characteristics: aquatic animals (can only live in water). The skin is covered with scales and belongs to warm-blooded animals.

A warm-blooded animal with fins (which can swim in water) breathes through its gills. In vitro fertilization is mainly ovoid, but also viviparous and ovoviviparous.

There are many kinds of fish, mainly divided into cartilage. For example, sharks are characterized by tough skin, tiny scales, no swim bladder, asymmetric caudal fin, five pairs of gills and no gill cover. Examples of hard bones: characteristics of rays: bones are hard bones, and there are many mucous glands on the skin, which are covered with bone scales and have swim bladders.

(2) Characteristics of amphioxus: They need to spend their infancy in water. It has a skeletal structure adapted to land, with limbs, moist skin and many glands.

The body has no scales and body hair. The tongue is forked, inverted and can extend outward.

The mating and fertilization of fish are carried out in water. Larvae breathe through gills, while adults breathe through skin, inner wall of mouth and lungs.

Classification of tailless amphibians: toad features: it has a skeletal system adapted to land life, and its body, trunk and limbs are split. The forelimb has four toes, and the hind limb has five toes and webbed toes. The hind limbs are suitable for swimming and jumping, but the main respiratory organs are the inner wall of the mouth and the skin. An example with a tail: salamander features: a skeletal system adapted to land life. It is an amphibian with a slender body and a tail. Ambodo example: fish salamander (3) reptile characteristics: terrestrial animals. Its skin is covered with scales or shields. It has waterproof skin and loses water. It belongs to a temperature-changing animal (its body temperature changes due to external temperature or heat source). It is mainly distributed in warmer areas of the earth. It is fertilized, oviparous or viviparous in vivo. It lays eggs on land. Eggs are wrapped in waterproof shells. Classification of reptiles testbyfindwo has a podded class: Tortoise features: hard shell. The upper and lower jaws have no teeth, but they have horny sheaths. The eggs have been laid. They can be divided into terrestrial, aquatic or marine life. Amber class: Cobra features: no limbs, shoulder straps and sternum. No movable eyes, face and external auditory canal. The tip of the tongue is forked and flexible. Skin.

5. Animal protection knowledge Animal protection knowledge and famous sayings and aphorisms

In order to protect frogs, Switzerland * * * conducted a national highway survey, and all important sections where frogs pass should be closed regularly to ensure that they can pass unimpeded. In secondary road sections, traps are dug by the roadside and plastic buckets are built in. Every morning, frogs caught in traps are collected by specialized personnel and sent to the highway for release. The German approach is to erect a green and eye-catching road sign beside the highway: "Make way for frogs!" " In Britain, if you see injured wild dogs or other animals in the street, just call the Wildlife Hospital, and they will take the injured animals to the hospital by using the Red Star emergency service center of British Railway. Animals escorted by the "Red Star" emergency team can enjoy first-class seats, transported in comfortable wooden boxes and equipped with air conditioning. Most of the funds are donated by all walks of life. The Italian environmental protection department spent $6.5438+200,000. A road tunnel was specially built for turtles coming ashore from the ocean to lay eggs, and fluorescent lamps were used as its "navigation". This is the world's first animal tunnel with lights. Former Indian Prime Minister Vip Singh was criticized by animal protection workers for wearing a real sheepskin hat. He had to write to the person in charge of the charity "Don't be cruel and beautiful", saying that when someone told me that it was cruel to treat animals like this, I wore an artificial fur hat. It is imperative to solve the "conflict" between human beings and wild animals through various channels. The compensation is more and more year by year, but the compensation is delayed year by year. It is necessary to establish a reasonable and efficient damage compensation mechanism as soon as possible to solve the problems of no source of funds and unclear compensation standards. Relevant persons of the State Forestry Administration said that the formulation of new compensation measures has been included in the work plans of relevant departments. To this end, the State Forestry Administration has conducted many investigations. The Ministry of Finance and other relevant departments were invited to participate in the discussion. In order to ensure that the compensation funds are in place, it is necessary to establish a special central financial fund for wildlife damage compensation. At the same time, the state should establish a reasonable compensation mechanism and make unified provisions on key issues. For example, the source of compensation funds can be compensated by the state finance for key protected animals. For non-key protected animals, it can be shared by the state and local finance, that is, the state compensation is the main one, supplemented by local compensation. What level of local compensation should be implemented? Some experts believe that in order to reduce the burden, it is more reasonable to share the compensation costs at the provincial, prefecture (city) and county levels. It is hoped that after the introduction of the new compensation method, the victims' losses can be compensated in time and the harmonious coexistence between humans and animals can be promoted. Love it, the fundamental contradiction of "conflict" between man and wild animals is the struggle for "home". Experts say that the habitats of wild animals have been destroyed and survived. It will invade villages and farmland on a large scale. Generally, the area where animals suffer the most is the center or edge of animal habitat. Therefore, the most fundamental way is to move people out of places that are not suitable for living and carry out ecological migration in a planned way. However, the immigration work needs a lot of financial support and must be supported by the state finance. In addition, we should also consider the living habits of local residents. For example, some ethnic minorities are used to living in the mountains and are unwilling to move out. Some people moved out and went back soon. Therefore, the issue of ecological migration should be decided according to different situations in different places, and the economic affordability should also be considered. In habitat management, we should respect the natural habits of wild animals. For example, the tiger's activity area needs to cover dozens of miles in Fiona Fang, so if you delimit it in a small circle, it is difficult for it to survive. Besides, some animals are used to living in groups, while others are used to being scattered. Wild animals that have developed to a certain scale and become "disaster-ridden" should also be treated differently, and measures should be taken to control their numbers in order to maintain ecological balance. If they are allowed to multiply in large numbers, it will not only affect the lives of local people, but also endanger the survival of other creatures in the biosphere. For example, rabbits and wild boars, which are prominent in various places, are very harmful to crops. If proved by experts, these figures are really too large. Some of them can be hunted in a planned way. This practice of controlling the number of wild animals also exists in other countries. Wild boar infested southern Japan, endangering crops. In order to control the number of wild boar, the authorities offer a reward for recruiting hunters, and those who kill "pigs" can receive bonuses with their tails. Kangaroos in Australia and wild ducks in North America are also under manual control. In addition, the local government should strengthen publicity and organize local people to take preventive measures, so that they can understand the habits of common wild animals and learn the skills of self-protection. They can also explore new protection modes in combination with local economic development. He Yong of the International Animal Welfare Foundation told reporters. The "Asian Elephant" protection project jointly carried out by IFAW and Yunnan * * * does not simply emphasize protection, but combines animal protection with community development. For example, farmers are encouraged to reform the planting structure and replace crops that elephants like to eat, such as corn and sugarcane, with tea. In this way, the phenomenon of elephants destroying crops disappears and farmers' income increases. Protecting wild animals is a better choice for human beings! Care for wildlife and protect beautiful homeland! Protect wild animals and realize the harmony between man and nature! Protect birds, protect wild animals and maintain ecological balance. It is a human virtue to love and protect birds. Protect wild animals and maintain ecological security! Wild animals are friends of human beings! Together on the earth, * * * enjoy nature! Protecting wild animals means protecting human beings! Birds are natural enemies of pests and friends of human beings. It is everyone's responsibility to care about migratory birds and protect the environment.

6. Knowledge about small animals

1, rabbit When the rabbit becomes an adult, the rabbit may turn around.

Turning in circles is a courtship behavior, and sometimes purrs at the same time. Usually, courtship in circles begins, which means the rabbit should be neutered.

Turning around may also mean wanting attention or asking for food. 2. Before lying down, dogs always turn around to make sure there is no danger before they can sleep peacefully.

Dogs like to be touched on their bellies and backs. Try not to touch the top of your head, because it will make it feel depressed and dizzy.

A dog shows its belly to others as a sign of surrender, repentance, obedience and coquetry. Dogs never attack opponents who fall and show their bellies.

Sleeping with his stomach up shows that he is at ease or trusting, so that people can see or touch his stomach. 3. If the cat is tired of being at people's feet and side, rubbing your head with your head is a sign of intimacy.

If a cat rubs the smell of its mouth on you, it means it wants to take you for itself. If a cat purrs in its throat, it means it is in a good mood.

If a cat is like a duck incubating an egg, its front foot bends inward, which indicates its peace of mind and dependence. 4. Hamsters Hamsters mainly feed on plant seeds, but also eat tender stems, leaves and fruits, and occasionally eat insects.

No hibernation. Live by eating stored food in winter.

In addition, some species are omnivorous and can be vertebrates, such as frogs. They stuffed food into their cheeks and took it back to store it in their caves.

When the hedgehog hibernates in its nest, its body temperature drops to 6℃. In this case, the hedgehog is the animal with the lowest body temperature in the world, breathing 1- 10 times per minute. Litter is hedgehog's favorite hibernation place.

At this time, if people burn fallen leaves, it will be a disaster for hedgehogs. The hibernating hedgehog wakes up occasionally, but doesn't eat, and soon falls asleep again. If it wakes up too early, it will starve to death.

7. Animal knowledge

1. Name: elephant, mammal, proboscis, Elephantidae. Elephant, commonly known as elephant, is the largest land animal in the world. Its main external feature is a flexible and muscular long nose, which has the function of winding and is a powerful tool for elephants to defend themselves and feed. There are only two species of proboscis, Asian elephant and African elephant, belonging to 1 family and 2 genera. Asian elephants were once widely distributed in South Asia and Southeast Asia south of the Yangtze River in China, but now their distribution is decreasing, mainly in India, Thailand, Cambodia, Vietnam and other countries. There are also a few wild populations in Xishuangbanna, China. African elephants are widely distributed throughout the African continent.

2. Monkey is a common name. Many animals in primates are called monkeys. Primates are 1 order mammals. The highest group in the animal kingdom, with developed brains; The track faces forward and the track spacing is narrow; The toes (fingers) of hands and feet are separated, and the thumb is flexible, and most of them can hold hands with other toes (fingers). Including prosimia and simian suborder. Protomonkey suborder has a fox-like face; No cheek pouch and buttock callus; The forelimb is shorter than the hind limb, and the thumb and big toe are developed, which can be opposite to other fingers (toes); The tail should not be curled or missing. Ape suborder has a human face; Most of them have cheek pouches and hip calluses; Most forelimbs are longer than hind limbs, and some big toes degenerate; Tails are long, some can be curled, and some have no tails. According to the geographical distribution or nostril structure, the suborder simian is divided into wide-nosed monkeys, also known as new world monkeys; Narrow-nosed monkeys, also known as old world monkeys. This order includes 1 1 family, about 5 1 genus, 180 species, mainly distributed in warm areas of Asia, Africa and America. Most of them live in forest areas. The largest primate is a gorilla, weighing 275 kilograms, and the smallest is a bonobo, weighing only 70 grams.

Leopards are quite successful hunters among animals. It sticks to its territory. However, in recent years, due to illegal poaching, the number of leopards is gradually decreasing.

From desert to rainforest, from plain to plateau, leopards can survive wherever they go. It wants nothing but prey and water. Today, leopards are still distributed in vast areas from Africa to the East. In Asia, leopards have been driven away by humans. In the virgin forests of India and Sri Lanka, a considerable number of leopards live. Their adaptability is very strong and their footprints are all over the Indian subcontinent. In India. This national park is one of the few unspoiled wild environments in the Indian subcontinent.

8. Knowledge about animals

Tortoise: 1) The circadian rhythm of tortoise is slower than that of other animals! Animals with slow circadian rhythm live longer! (2) The tortoise's metabolism is very slow! And the slower the metabolism, the longer its life! (3) Turtles have amazing hunger and thirst tolerance! (4) The sexual maturity of turtles is very long! Generally, the shorter the sexual maturity of animals, the shorter the life span! Like rats. (5) The tortoise has the ability of long-term dormancy. Like hibernation.

Dragonfly: (1) Dragonflies fly very fast, some of which can reach 100 kilometers per hour, and can also stay in the air for a short time. It can't change its direction flexibly when flying forward, so it has to hold its body steady and turn. When resting, the wings are still open, that is, the wings can't be folded, so there should be considerable space to stay, mostly on the branches or leaves. (2) The mating of dragonflies also occurs in flight. Male dragonflies grasp the neck of female dragonflies with hooks at the end of abdomen; The female dragonfly's abdomen bends from bottom to front, connecting the reproductive hole to the storage organ under the second abdominal segment of the male dragonfly, and then the male dragonfly is fertilized. Female dragonflies lay eggs in the water, and most of them touch the water with their tails when flying, so as to expel the eggs. Our common so-called "dragonfly water" is its performance when it lays eggs.

Bat: Bats are truly weak eyesight. It flies at night by its own sound waves (ultrasonic waves). As a result, scientists were inspired by bat's ultrasonic navigation and predation of insects, and invented radar for modern science and technology and aerospace military.

Kangaroo: Kangaroo can control the growth and development of the fetus. Humans and other animals can't do this. Only kangaroos can do it.

Snakes: poisonous snakes kill enemies with venom, while non-poisonous snakes suffocate enemies by winding.

Gecko: When in danger, it will throw off its tail to protect itself! That tail is specially used to get rid of and protect yourself!