Essay about frogs

Introduction to frog, the English name is frog. Amphibians, the most primitive frogs, began to appear in the early Triassic period. Collection of frog photos (12 photos) belongs to the Kingdom Animalia, Phylum Chordata, Class Amphibians, and Order Anura. The earliest jumping frogs today appeared in the Jurassic. {The area in Lujiang, Anhui is called Kanba (dialectal pronunciation kan ba), and the area in Liwan District, Guangzhou, Guangdong is called Bodong (dialectal pronunciation bo dong). The most primitive frogs began to appear in the early Triassic period. The earliest jumping frogs today appeared in the Jurassic. Frogs are anurans in the class Amphibians. Adults have no tails. Their eggs are laid in water, fertilized outside the body, hatch into tadpoles, and breathe with gills. After metamorphosis, adults mainly breathe with lungs and also use skin to breathe. Frogs and toads have similar morphological structures. There is no strict distinction between the two types of animals. Toads have rough skin; frogs are slender and are good at swimming. The frog's neck is not obvious and there are no ribs. The ulna and radius of the forelimb are healed, and the tibia and fibula of the hindlimb are healed. Therefore, the claws cannot rotate flexibly, but the muscles of the limbs are well developed. In addition to the white belly of the frog, the head and back are yellow-green with some dark brown markings. Some have three white marks on their backs. It is a national third-level protected animal. Adult frogs use both lungs and skin to breathe, and can live on land without water. It is the first step for organisms to move from water to land. It is more advanced than other aquatic organisms, but reproduction is still inseparable from water. Larvae need to undergo metamorphosis in water to grow. Edit this paragraph Basic information When a frog swallows food, it will: blink its eyes. Frogs belong to: cold-blooded animals. Frog's respiratory organs: lungs and skin. Frog larvae tadpoles. Respiratory organs: gills. The way the frog's eyes and face are closed: from bottom to top. The base of the tongue is in his mouth: at the front of the mouth. The structure of the frog's tongue: the base of the tongue of a frog is outside, the tip of the tongue is inward, and there is mucus on the tongue to facilitate catching insects. Frogs have four toes on their front feet and five toes on their hind feet, as well as webbed feet. There are two slightly bulging little bumps on either side of the frog's head. Those are its eardrums, through which the frog can hear. The frog's back is green, smooth, soft, and patterned, and its belly is white. You can hide it in the grass, making it easier to catch pests, and you can also protect yourself. Its skin also helps it breathe. Its air sac is only found in male frogs. Frogs hunt with their tongues, which are covered with mucus. Frogs are oviparous, and the eggs hatch into tadpoles and finally turn into frogs. The frog's body is divided into three parts: head, trunk and limbs, with smooth skin. In terms of movement and hunting, they include: swimming, jumping, and catching food with their tongues. In terms of reproduction and development, they are: egg-laying and metamorphosis. The living environment is: they can only live in water when they are young, but they can also live on land when they grow up. Frogs use their lungs to breathe, but they can also breathe from the air through their moist skin. Take in oxygen. The various pigment cells in its skin will also expand or contract with the humidity and temperature, resulting in changes in the color of the skin. Frogs usually inhabit rice fields, ponds, ditches or grass along rivers, and sometimes lurk in the water. Usually hunts at night. Frogs are omnivorous animals, in which plant food only accounts for about 7% of the diet; animal food accounts for about 93% of the diet. From the dissection of 60 frogs, it was found that among the animal foods, the swallowed animals involved four phyla, four classes, ten orders, and more than thirty families. Among the 156 prey animals, Insecta accounted for 80%, and Lepidoptera accounted for the most: 11 rice leaf rollers, 10 rice borers, 7 rice bracts, 10 armyworms, 2 corn borers, cotton red 2 bollworms, 2 ash borers, 3 Spodoptera exigua, and 5 rice-eye butterflies. The order Coleoptera followed: 5 rice mud bugs, 6 rice weevils, 2 scarabs, and 4 ladybugs. Followed by Hemiptera (8 white-backed planthoppers, 7 gray-backed planthoppers, 2 black bugs, 6 brown-backed planthoppers) and Diptera (8 rice leafminers, 5 Chironomidae Only, 2 fruit flies and 3 mosquitoes). Anurans are animals belonging to the class Amphibians. Adults are basically tailless. Eggs are usually laid in water and hatch into tadpoles, which breathe through gills. After metamorphosis, adults mainly breathe through lungs, but most skins also have some respiratory functions. It mainly includes two types of animals: frogs and toads. There is no strict distinction between these two types of animals, and some families include both species at the same time. Generally speaking, toads live mostly on land, so their skin is rough; frogs are slender and are good at swimming. The two bodies are similar in shape, with an inconspicuous neck and no ribs. The ulna and radius of the forelimb are healed, and the tibia and fibula of the hindlimb are healed. Therefore, the claws cannot rotate flexibly, but the muscles of the limbs are well developed. Frog is the collective name for the amphibians of the family Ranaidae. The frog in the north is commonly known as Daqingguaizi. Its original name is frog, green chicken, sitting fish, salmon, and its scientific name is black-spotted frog. It is a nationally protected wild animal and is known to everyone from children to the elderly. Its populations are widely distributed in the plains, hills, and mountains of China, but the individual quality of frogs native to the north is the best. Its dried fallopian tube product, ground chicken oil, "can also be used as hash frog oil." Edit this paragraph Appearance characteristics There are about 4,800 kinds of frogs, most of which live in water, but some also live in trees in humid environments in rainforests. The eggs are laid in water, and some tree frogs can pass the eggs through the tadpole stage simply by using residual puddles accumulated in tree holes or at the roots of plant leaves. In 2003, a new species of "purple frog" was discovered in western India. It lives in holes in the ground all year round and only comes out of the hole to give birth when the monsoon brings rain. Recently, a "fluctuating frog" was discovered in Liwan District, Guangzhou, Guangdong, but it looks like a toad.

It is difficult to distinguish between frogs and toads absolutely. Some families, such as the family Discoglossidae, include both frogs and toads. But the newest species, the "fluctuating frog", has not yet been classified. The smallest frog is only 5 centimeters, which is as long as a person's thumb, and the largest one is 30 centimeters (more than a foot long). The pupils are horizontal, the skin is smooth, and the tip of the frog's tongue is It is forked in two, and the tongue follows the front of the mouth, grows back into the mouth upside down, and can suddenly flip out to catch insects. It has three eyelids, one of which is transparent to protect the eyes in the water, and the other two upper and lower eyelids are ordinary. There are two vocal sacs on both sides of the head, which can produce cries and amplify the calls. Smaller species have more frequent calls. Some frogs secrete venom from their skin to protect themselves from predators. The secretions of a poison dart frog living in the Amazon rainforest are used by local Indians to make curare, which seals the throat when blood is seen. Frog’s eyes are very special. It turns out that the nerve cells in the retina of the frog eye are divided into five types. One type only responds to color, and the other four types only respond to certain characteristics of the moving target, and can transmit the decomposed characteristic signals to the visual center of the brain - the visual center. Top cover. There are four layers of nerve cells on the optic tectum. The first layer responds to the contrast of the moving target; the second layer can extract the convex edges of the target; the third layer only sees the surrounding edges of the target; and the fourth layer only sees the dark target. The light and dark changes of the leading edge. These four layers of features are like drawings on four sheets of transparent paper. When stacked together, they form a complete image. Therefore, among the rapidly flying small animals of various shapes, the frog can immediately identify the flies and moths it likes to eat most, but has no reaction to other flying things and stationary scenery. Edit this paragraph Living environment Frogs are distributed all over the world except Caribbean islands and Pacific islands. However, it is currently declining rapidly around the world, mainly due to environmental pollution, climate change, the invasion of alien species, and the shrinking of the habitat due to human expansion. The expansion of human life has caused the continuous reduction of frogs. Nowadays, frogs are rarely seen in forests and swamps. Edit this paragraph Life habits of frogs are basically similar to toads. They also feed on insects, but large frogs can prey on fish, rodents, and even birds. Basically hunts at night. Frogs prey on a large number of field pests and are beneficial to humans. It is not only the natural enemy of pests and the guardian of harvest. The familiar and sweet frog croaking is actually like the never-ending music played by nature, a harmonious song of the fields. "The fragrance of rice flowers means a good harvest, and you can listen to the sound of frogs." When there are frogs croaking, farmers have hope of sowing, and when there are frogs croaking, there is joy and joy in harvesting! In the past, there were vast ponds in urban suburbs and villages, where frogs lived. However, they were swallowed up by the urban sprawl almost overnight, and some remaining frogs became real frogs in the well. Although they were lucky enough to survive, they unfortunately lost their fields, their seedlings, their space and freedom of movement, and even had to wait until In the dead of night, people dare to timidly send out a few chirps, softly and slowly, as if they are afraid of disturbing the beautiful dream of the city, and they seem to call out to their companions who are far away from them. But more and more of their companions are also wailing more desperately in other corners of the city! Pairs of greedy hands caught them from the fields, and pairs of numb hands bought them. Before they even had a chance to take a look at the unfamiliar city, they became meat on every desk in every house! Compared to those pairs of big hands that were either greedy or numb, their resistance seemed so weak and feeble, and they could only let out miserable and desperate wails! Edit this paragraph Population Status Decline Most species of amphibians have declined on the earth, and frogs are blamed for many factors, the most important of which are frequent human activities and global warming. The rapid development of industry, on the one hand, has led to the extinction of species; on the other hand, due to industrial pollution, especially chemical industry pollution, the ecological environment has worsened and wetlands have been destroyed on a large scale. Recent research has found that triphenyltin, a compound used as an agricultural fungus inhibitor, can cause deformation and even death in several species of frogs, even at levels below field concentrations. The fungicide triphenyltin is mainly used to deal with diseases in sugar beets and potatoes, but is sometimes used in onions, rice and other crops. This inevitably pollutes the aquatic ecological environment, sometimes directly contaminating rice fields, and also contaminating rivers and ditches through surface runoff. Because the liquid phase of triphenyltin degrades very slowly, it accumulates in water, causing great harm to aquatic organisms, especially damaging the central nervous system of the tadpole brain. Hazards Generally speaking, the higher the concentration of fungal inhibitors, the more toxic they are to organisms. In amphibians, chemicals often cause stunted growth, which in turn makes it harder for them to escape predators. This may well be responsible for the extinction of frog populations in some areas. Other pollutants are responsible for amphibian declines in more areas, but acid rain is one of the main culprits. In fact, the eggs and larvae of almost all amphibians cannot survive in water with a pH below 4.5. However, the pH of acid rain is generally around 3.5, which can cause the normal pH in ponds and streams to drop to lethal levels. Acid rain has been identified as a cause of amphibian declines in ponds and lakes in Canada, Scandinavian countries and Eastern Europe. Natural Factors Perhaps the most responsible factor for the decline of amphibians in larger regions and even globally is the loss of ozone.

As the earth's ozone layer thins and the amount of ultraviolet radiation increases, amphibian eggs will be unable to hatch into larvae. Other amphibians most likely to be affected by increased UV radiation are those that live in colder regions and closer to the poles. Those areas have the thinnest ozone layer. Amphibians must bask in the sun to regulate their body temperature. As a result, they are exposed to increased radiation and deoxygenation. RNA molecules are destroyed. Environmental hormones may also be responsible for global amphibian declines, and pollutants broken down by pesticides like DDT have the potential to wreak havoc on amphibians' ability to reproduce in frogs, similar to aquatic creatures such as fish and crocodiles. In fact, it has been found that this environmental hormone masculinizes some female tree frogs and feminizes male tree frogs in other species, making them sterile as a result. This hormone molecule, which is not easily decomposed in the environment, is deposited in the sludge at the bottom of ponds and lakes and is swallowed by the larvae of amphibians living on the bottom. The hormone is effective in very small accumulations and is easily dispersed by the wind, posing a global threat regardless of its native range. The increasingly serious greenhouse effect on the earth has not only caused strange changes in the climate, but also caused a gradual increase in the number of color-changing frogs. Various orange, white, and even pink frogs have appeared in many places. This phenomenon is definitely not related to nature. Humans are kidding. Deformed frogs. Many deformed frogs found in North America are caused by excessive levels of vitamin A complex in the living environment, which contains retinoic acid. It is a hormone that can control several important aspects of the development process of vertebrates. Its Excessive amounts can also cause reproductive abnormalities in humans. In the United States, some severely deformed frogs have appeared in wetlands near lakes and rivers. Some have only three legs, some are missing the front two legs, and some have three or four hind legs. This news caused shock and close attention from environmental experts and people around the world. In this regard, some people think that parasites are to blame, some think that pesticides are the culprit, and others think that the destruction of the ozone layer causes excessive ultraviolet rays to pollute the environment and cause animal deformities. The biggest possibility is caused by water source pollution. What can currently be confirmed is that water sources are contaminated by a variety of substances, including special pesticides, heavy metals, chlorides, and of course contamination by other chemical substances. Because frogs are amphibians, they are generally regarded as accurate barometers or indicators of environmental health. When frogs are developing, their embryos are directly immersed in water, making them more susceptible to teratogens and therefore more fragile. For humans, although their embryos are protected by a variety of factors during development, hormones that cause frog deformities can also affect humans, and the possibility of human deformities also exists. There is no doubt that what can deform frogs can also deform humans. It's only a matter of time before this day comes. Therefore, our conclusion is: protecting the ecological environment is to protect human beings themselves! Edit this paragraph Classification Frogs refer to amphibians without tails such as frogs (black-spotted frogs), toads (commonly known as toads), and fluctuating frogs. They are classified into the phylum Chordata, the subphylum Vertebrates, and the class Amphibians. Because the skin is exposed, it cannot effectively prevent the evaporation of water in the body, so they cannot live without water or a humid environment throughout their lives, and are afraid of drought and cold. Therefore, most of them live in tropical and temperate rainy areas, and there are very few species distributed in cold zones. Frogs in my country There are about 130 species of deformed frogs produced by pollution, and almost all of them are experts at destroying pests in forests and farmland. Common frogs in farmland include black-spotted frogs, marsh frogs, golden-threaded frogs, flower-backed toads, etc. The bullfrog introduced from Cuba can be regarded as a "giant" among frogs, with a body length of up to 20 centimeters. Its mooing sound is very similar to that of a cow, so it is called a bullfrog. In fact, there are also very large frogs in our country, such as the tiger-striped frog that lives in the rice fields in the south of the Yangtze River. It is more than 12 centimeters long and its sound is like a dog barking. The spiny frog that lives in the mountains and streams in the south of the Yangtze River is also called "stone chicken" and its body length is about 12 centimeters. So how big is the smallest frog in my country? It’s only slightly larger than a broad bean. In early spring and February, flowers are in full bloom on Hainan Island. At this time, the sound of "croak" can be heard near the rice fields during the day. This is one of the smallest frogs, the frog frog, courting a mate. It is only 2.5 centimeters long. When it sings, a large bubble - a vocal sac - will bulge out from the lower part of its throat. Sometimes, you can also hear bursts of "squeaking" sounds coming from among the water plants. It is the sound of a small frog that is not easy to find - the floating frog. The floating frog is gray and only 2 centimeters long. It often floats among aquatic plants with only its head exposed. As soon as there is any movement, dive and escape immediately. Despite their small size, these frogs are natural enemies of small pests and termites. There are about a dozen species of tree frogs in my country. They are light and thin, have suckers on their fingertips, and are good at climbing tall tree trunks or short bushes. Their body color matches the surrounding environment. The smallest frog in the world is the pitcher plant frog (Microhyla nepenthicola). Scientists discovered this frog in and around pitcher plants in the rainforest of Borneo island in the Malay Archipelago. Adult males of this newly discovered frog are about the size of a pea. This size makes them difficult to spot. Fortunately for scientists, this frog loves to chirp very loudly. The reproductive characteristics of frogs are dioecy, fertilization in water, and oviparity. The breeding time is around mid-to-late April each year. During the reproductive process, frogs have a very special phenomenon - ecstasy.

It should be noted that the mating of frogs is not mating, but only a link in the reproductive process. Studies have shown that if male and female frogs are artificially separated (that is, there is no mating process), then even during the reproduction of frogs During this period, female frogs are also unable to release eggs. It can be seen that the biological significance of hugging is mainly to promote female frogs to ovulate. Generally, frogs lay eggs and are fertilized in the water. After the eggs hatch, they turn into tadpoles, live in the water, and then turn into young frogs to land and move. However, the way tree frogs lay eggs is different. The eggs laid by spotted-legged tree frogs look like a ball of white soap foam or a ball of butter, adhering to the water plants. The most interesting thing is the Emei tree frog, which lays its egg masses on the leaves near the water. The eggs develop in the egg masses, and then fall into the lake and continue to develop. Another example is the harp frog, which has a sweet chirp. Before laying eggs, it will build a mud nest and then lay the eggs in it. Some species of tree frogs do not climb trees but live in water. Some tree frogs, such as red-webbed tree frogs and black-webbed tree frogs, have wide webs between their fingers and toes. They can spread their webs and glide from high branches to low places, so they are also called flying frogs. In addition to tree frogs, there are also tree frogs and turbulent frogs that have suckers. Among them, turbulent frogs are particularly special. They like to live in turbulent waters and can nimbly cross rapids and climb rocks. The tadpole of the Turbulent Frog is also very strange. It has a sucker on its abdomen that can cling to rocks to prevent it from being washed away by the rapids. The "bearded" toad is a unique and rare frog species in my country. It was first discovered in Mount Emei and was later discovered in several southern provinces. The snout of this frog is wide, round and flat, and the male has 12-16 vertebral horny black spines on the upper jaw edge, so it is called the bearded toad. The functions of these "beards" are still under study. There are many types of frogs, but no matter which one they are, they mainly feed on pests. Edit this paragraph of history As frogs continue to evolve, various scary and weird-looking frogs have appeared. Some frogs secrete venom from their skin to protect themselves from predators. The secretions of a tree frog living in the Amazon rainforest have been Local Indians use it to make poisonous arrows, which seal their throats when they see blood. The ancestors of frogs originally lived in the water. Later, due to changes in the living environment, some rivers and lakes became land. As the environment changed, the ancestors of frogs gradually developed from water to land. The changes in the living environment forced frogs to The ancestors of humankind made corresponding "adjustments" to their body organs to adapt to changes in the environment. Some species that could adapt to life on land survived. Their locomotion organs changed from tails that swam in the water to limbs that could move both on land and in water, and their respiratory organs changed from gills to lungs. The transition from aquatic to terrestrial life by the ancestors of frogs was not very complete, so it was manifested in the larval development of frogs. The difference between tadpoles and frogs is the legacy left to them by their frog ancestors. Edit this paragraph: Frogs are good at catching insects. They love to eat small insects. Their movements when catching insects: A frog is lying in a small frog hunting pit, with its hind legs curled up and kneeling on the ground, its front legs supporting it, its mouth open and its face raised. , my stomach is bulging, waiting for something. A mosquito flew over and dangled in front of the frog. The frog suddenly jumped up, flipped its tongue, and landed on the ground again. The mosquito disappeared, and it sat still, waiting for the arrival of the next insect. Analysis of Frog Predatory Movements Singer There is a bulging thing near the frog's mouth that can make sounds. When does it love to sing loudest? In hot summer, frogs usually hide in the grass and occasionally shout a few times, but only for a short time. If one barks, the one next to it will also bark several times, as if they are singing in antiphonal. The frogs chirp most happily after heavy rain. At this time, there will be dozens or even hundreds of frogs chirping "Quak, quack, quack, quack". The sound can be heard from miles away, like a majestic symphony, as if for Singing praises for agricultural harvest! Vocal organ The vocal organ of the frog is the vocal cords. Located above the laryngeal cartilage. Some male frogs also have external vocal sacs on both sides of their mouth corners that can inflate and vibrate. The vocal sacs produce cries, making the frog's song majestic and loud. After the rain, when you walk to the pond, you will hear the male frog's cry. The sounds echoed each other, one after another, forming a chorus. Scientists pointed out that the chorus of frogs does not sing randomly, but has certain rules. There are many forms such as leading singing, chorus singing, unison singing, accompaniment singing, etc., and they cooperate closely with each other, making it a veritable chorus. It is speculated that chorus is much superior to solo singing because it contains more information; the sound of chorus is loud and spreads far, which can attract more female frogs, so frogs often adopt the form of chorus. Athlete: Its eyes are bulging, its head is triangular, and its crawling movements are so slow that you might think it is a bit silly. However, when you get a little closer, you jump suddenly into the pond with floating duckweeds. This jump was a distance of 20 times its body length! Then, it swam to the other side in the most standard breaststroke posture. Master of Disguise: Except for the white belly of the frog, the head and back are yellow-green with some dark brown markings. Some have three white marks on their backs. Why are frogs green? It turns out that the frog's green clothes are a good camouflage. It is almost the same color as the grass in the grass, which can protect itself from being discovered by the enemy. The frog has two round and protruding eyes on its head, a wide and big mouth, and a long tongue. The back of the body is green with dark stripes, and the belly is white. There are four legs under the body, the front legs are short, the hind legs are long, and there are webs between the toes. Frogs are amphibians that can jump on the ground and swim in the water. They make a "croak" sound, and the male's cry is loud. In spring, frogs lay eggs on water plants, and the eggs slowly turn into tadpoles.

The tadpole is black, with a round body and a long tail. The tadpole grows up day by day, first growing back legs, then front legs, and the tail gradually shortens and degenerates, and finally turns into a frog. Frogs are good at catching pests. They rely on their long and wide tongue to catch pests. The base of the tongue is in the front of the mouth, and the tip of the tongue is backward and bifurcated. There is a lot of mucus on it. As long as small flying insects fly by, it will snap. It jumped up, opened its mouth, and quickly stretched out its long tongue to eat the pests at once. The eyes of a frog are slow to see static things and sharp to see moving things. Edit this paragraph Medicinal value Frogs are also medicinal frogs that integrate food, health care products, and medicines. Edible, it is an excellent green food. Li Shizhen's "Compendium of Materia Medica" of the Ming Dynasty contains: "Southerners eat it and call it frog, because the meat tastes like chicken." "Eat the best." Medicinal, it is a dietary health product and medicine. According to the "Northeast Animal Medicine": "Frogs can be used fresh or dried in the shade, and can be used as medicine as a whole." It has the effects of "diminishing water and reducing swelling, detoxifying and relieving coughs", and can "treat edema, asthma and cough, measles, menorrhagia, etc." Its adult gallbladder, liver, brain and skin can be used for medicinal purposes. Larvae tadpoles have the effect of extending life. After investigation, the medicinal uses of frogs have been found in "Compendium of Materia Medica", "Compendium of Materia Medica", "Compendium of Materia Medica", "Rihuazi Materia Medica", "Animal Materia Medica", "Compendium of Materia Medica", "Compendium of Materia Medica", "Compendium of Materia Medica", "Daily Materia Medica", "Terrestrial Materia Medica", "Dictionary of Traditional Chinese Medicine", "Dictionary of Traditional Chinese Medicine Names", "Dictionary of Chinese Medicine", "Encyclopedia of Practical Chinese Herbal Medicine", "Chinese Animal Medicine" , "Chinese Animal Medicine", "Chinese Medicinal Animals", "Medicinal Animals", "Jilin Chinese Herbal Medicine", "Compendium of Medicinal Materials", "Compendium of Modern Materia Medica", "Collection of Modern Research on Traditional Chinese Medicine" and more than 20 kinds of traditional Chinese medicine. It is recorded in books. Modern research results show that: every 100 grams of fresh frogs contains 87 grams of water, 11.9 grams of protein, 0.3 grams of fat, 0.2 grams of carbohydrates, 0.6 grams of ash, 22 mg of calcium, 159 mg of phosphorus, 1.3 mg of iron, and 0.44 thiamine. mg, riboflavin 0.22 mg, niacin 2.1 mg. The frog's body also contains polypeptides, multivitamins, various biological hormones, enzymes and moisturizing factors. Professor Taylor of Amphibian Rescue International said: "Frogs can benefit humans because their skins contain compounds to deal with diseases, including antibacterial and antiviral substances. The medicines extracted from frog skins are 'almost unlimited', and 'frogs can Providing a large number of new medicines', they are like a 'pop-up pharmacy'." Edit this paragraph Reject frog meat Modern medicine has proven that frog meat not only has no special nutrients, but eating too much will affect human health and even lead to parasitic diseases. Frogs generally live in farmland. A lot of chemical fertilizers and pesticides are applied to crops. The increased dosage and unreasonable application of pesticides cause pests to become resistant to pesticides. The development of resistance leads to a continued increase in the dosage of pesticides. Frogs often swallow pests containing chemical fertilizers and pesticides. and water sources, pesticides will accumulate in the frog's body. If humans eat it, the pesticide residues will enter the human body. Pesticide residues can poison the human body through the "food chain", causing chronic pesticide poisoning, leading to various cancers and tumors; and may even cause congenital malformations in babies. Frogs are also hosts to a variety of parasites, viruses and bacteria, and cooking cannot completely eliminate them. Among them, there are two types that are more harmful to human health: Echinostomatous nematode, tapeworm Mansoni and larvae. When people eat frog meat with these worms, the worms may molt in the human body and transform into third-stage larvae or early adults, making the human body sick. Parasites migrate around the human body, causing damage to various parts of the body, especially the skin and muscle tissue. When the parasites migrate, they form abscesses and nodules in the areas where the parasites stay. When they migrate to the nervous system, they can cause inflammation of the brain and spinal cord. There have been cases of death caused by eosinophilic cerebrospinal inflammation due to this parasite in China. The vitality of double-grooved larvae is very tenacious. Even if the frog meat is stir-fried or deep-fried, it is not easy to be killed. Once this double-grooved larvae invades the human eyeball, it can easily lead to corneal ulcers, vision loss, and even blindness. Frogs are protected animals that are prohibited from being hunted by the state. However, in daily life, many people regard frog meat as a supplement or delicacy, leading some traders to kill frogs on a large scale. Catching frogs will inevitably destroy the ecological balance and lead to the proliferation of pests. In order to ensure the yield of crops, people are bound to use a large amount of various pesticides. After frogs eat some pests that are lucky enough to survive, pesticides accumulate in the frog's body. People who eat too much frog meat can easily suffer from food poisoning. This will bring harm to human health.