Frog: tián jī 1. Frog is generally what southerners call frogs, just like Northeasterners call corn corn. In fact, the thing is the same thing. As for the classification of frog types, it should be Another question. Personally, I feel that frogs and frogs are generic terms for frogs. The buguo tiger frog is the real frog frog, which is the black-spotted frog. This is the difference and classification of frogs. Since black-spotted frogs and tiger-striped frogs are difficult to observe clearly without careful distinction, and they are also somewhat similar, frogs have become the name for frogs among southerners, just like Northeastern people call corn corn, but there are actually many types of corn. Your last sentence is correct, "Because too many people think that frogs are frogs, they call frogs another name: Rana tigerina rugulosa. Because they are often found in low-altitude rice fields, and their meat is more tender than chicken." , so it is called frog. Also known as tiger frog, tiger frog, wrinkled frog or water chicken, it is an aquatic frog and a species of red frog. The male tiger frog is a medium-sized frog. The body length is 6 to 8 centimeters, and the female body length is 6 to 12 centimeters, and the maximum length is 15 centimeters. Its meat is suitable for human consumption. The famous Guangdong dish includes frog rice. The tiger frogs currently sold in the market are artificially raised. Breeding. 2. Bird name. The shape is slightly like a chicken, the body is small, the feathers are reddish brown, the back is olive, the beak is green and brown, and the feet are red. Frogs belong to the animal kingdom, Chordata, and are amphibians. Class, Anura, Eo-Rana, Meso-Rana, and Neo-Rana. The English name is frog. Anurans are animals that belong to the class Amphibians. The adults are basically tailless. Their eggs are usually laid in water and hatch into tadpoles with gills. Respiration, after metamorphosis, adults mainly use lungs to breathe, but most skins also have some respiratory functions. There are two types of animals: frogs and toads. There is no strict distinction between these two types of animals, and some families generally include both. Generally speaking, toads mostly live on land, so their skin is rough; frogs are more slender and are good at swimming. The two bodies are similar, with an unobvious neck and no ribs. The ulna and radius of the forelimb are healed, and the tibia and fibula of the hind limb are healed. Therefore, the claws cannot move flexibly, but the limbs are well muscled. Anurans are the first step for creatures to move from water to land. They are more advanced than other amphibians. Although most of them can live out of water, they still cannot do without water, and eggs are needed. They can only grow after metamorphosis in water, so they are not as advanced as reptiles, which can already live completely out of water. Frogs: There are about 4,800 species of frogs, most of which live in water, and some also live in trees in humid environments in rainforests. The eggs are laid in water, and some tree frogs can use the remaining puddles in tree holes or at the roots of plant leaves to pass the eggs through the tadpole stage. In 2003, a new "purple frog" was discovered in western India that lives all year round. In the caves under the ground, they only emerge from the caves to give birth when the monsoon brings rain. It is difficult to distinguish between frogs and toads. Some families, such as the family Discoglossidae, include both frogs and toads. The smallest frog is only 50 years old. millimeters, which is only equivalent to the length of a person's thumb, the big one is 300 millimeters (more than a foot long), the pupils are horizontal, the skin is smooth, the tip of the tongue is bifurcated, the tongue follows the front of the mouth and grows back into the mouth upside down , can suddenly turn out to catch insects. It has three eyelids, one of which is transparent to protect the eyes in 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 them. Calls. Smaller species have higher call frequencies. Some frogs secrete venom from their skin to protect themselves from predators. The secretions of a tree frog living in the Amazon rainforest are used by local Indians to make curare. Throat closure. Frogs are found throughout the world except the Caribbean 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 reproduction method of frogs is basically similar to that of toads. They also feed on insects, but large frogs can prey on small fish and even mice. Basically hunts at night. Frogs prey on a large number of field pests and are beneficial animals to humans.

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 sound. 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 function of these "beards" is still under study. There are many types of frogs, but no matter which one they are, they mainly feed on pests. Skills of frogs 1. Expert at catching insects. There is a pond in front of my house, surrounded by crops and weeds. Every summer, frogs make their homes by the pond and become my neighbors. I often went to the pond to watch frogs, and gradually became familiar with their characteristics and living habits. Frogs love to eat small insects, and the way they catch and eat them is really interesting. One day after dinner, I squatted by the pond and watched frogs catching mosquitoes. A frog was lying in a small pit, with its hind legs curled up and kneeling on the ground, its front legs supporting it, its mouth open and its face raised, its belly bulging, waiting for something. Suddenly a mosquito flew over and dangled in front of the frog. The frog suddenly jumped up, flipped its tongue, and fell to the ground again. The mosquito disappeared, and it sat down again, waiting. I heard from the farmer uncle that a frog can eliminate 10,000 pests a year. It is really our good friend! 2. Singer There is a bulging thing near the frog's mouth that can make sounds. When does it like to sing loudest? In hot summer, frogs usually hide in the grass and occasionally shout a few times, but the time is also very short. If one barks, the one next to it will also bark several times, as if they are singing in antiphony. 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 hymns for agricultural harvests! 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 cry of the male frog. 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 lead 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. 3. Athlete Look, a frog is crawling staggeringly in the grass. Its eyes are bulging, its head is triangular, and its crawling movements are so slow that you might think it's a little silly. However, when you get a little closer, it jumps suddenly and jumps 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. Oh, the frog is actually a good long jumper and an expert in swimming! 4. Master of disguise. Except for the white belly of the frog, the head and back of the frog 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.