Frog, English name frog. Among amphibians, the most primitive frog began to appear in the early Triassic.
The frog photo album (12 photos) belongs to the animal kingdom, Chordata, Amphibia, Anura. The earliest frog with jumping action appeared in Jurassic. ? {Anhui Lujiang area is called kanba (dialect sound Kan? Ba), Liwan District, Guangzhou City, Guangdong Province, is called bo (dialect Bo? Dong). The most primitive frogs began to appear in the early Triassic. The earliest frog with jumping action appeared in Jurassic. ? Frogs are amphibians. Adults are tailless, eggs are laid in water, fertilized in vitro, hatched into tadpoles, and breathed through gills. After metamorphosis, adults mainly breathe through the lungs and skin. ? Frogs and toads are similar in morphology and structure, and there is no strict difference between the two types of animals. Toads? How rough the skin is; Frogs are slim and good at swimming. ? Frogs have inconspicuous necks and no ribs. The ulna and radius of the forelimb healed, the tibia and fibula of the hind limb healed, the claws could not rotate flexibly, but the limbs were muscular. This frog has a white belly, a yellow-green head and back, and some dark brown stripes. Some have three white marks on their backs. It is a national third-class protected animal. Adult frogs breathe through their lungs and skin and can live on land without water. This is the first step for creatures to land from the water. It is more advanced than other aquatic organisms, but its reproduction is still inseparable from water. Larvae need to undergo metamorphosis in water to grow. Frogs blink when swallowing food? Frogs belong to: warm animals? Respiratory organs of frogs: lungs and skin? Frog larva tadpole respiratory organ: gill? Frog's eyes and face are closed: from bottom to top? The frog's tongue is in its mouth: in front of its mouth? Frog's tongue structure: the root of frog's tongue is outside, the tip of tongue is inward, and there is a sticky frog on the tongue.
In order to catch insects. ? Frog has four toes on its front foot, five toes on its back foot and webbed feet. There are two slightly bulging bags on both sides of frog's head. That's its eardrum. Frogs can hear sounds through it. Frog's back is green, smooth and soft, with patterns, and its abdomen is white. You can hide it in the grass, which makes it easier to catch pests and protect yourself. Its skin can also help it breathe. Its airbag is only available to male frogs. Frogs hunt with their tongues, which contain mucus. Frogs are eggs, which hatch into tadpoles and finally become frogs. ? Frog's body is divided into trunk and limbs, and its skin is smooth. ? Sports predation is: swimming, jumping and hunting with the tongue. ? Reproductive development is: oviposition and metamorphosis change from tadpoles? The living environment is: when I was a child, I could only live in water, but when I grew up, I could live on land? Frogs breathe with their lungs, but they can also draw oxygen from the air through wet skin. Various pigment cells in its skin will also expand or contract with the change of humidity and temperature, thus changing the depth of skin color. Frogs usually inhabit rice fields, ponds, ditches or grass by the river, and sometimes they lurk in the water. Usually they hunt at night.
Frogs are omnivorous animals, among which plant food only accounts for about 7% of the diet; Animal food accounts for about 93% of the diet. From the dissected 60 frogs, it was found that among the animal food, the animals that were swallowed involved 4 phyla, 4 classes, 10 orders and more than 30 families. 156 Among the preyed animals, Insecta accounts for 80%, and Lepidoptera is the largest: rice leaf roller 1 1, rice borer 10, rice corn borer 7, armyworm 10, corn borer 2, cotton bollworm 2 and pink borer 2. COLEOPTERA followed closely: 5 rice mud worms, 6 rice weevils, 2 scarabs and 4 ladybugs. Followed by Hemiptera (8 white-backed planthoppers, 7 gray-backed planthoppers, 2 rice black stinkbug and 6 brown-backed planthoppers) and Diptera (8 rice miners, 5 chironomids, 2 fruit flies and 3 mosquitoes). ? Anurak is an amphibian. Adults are basically tailless. Eggs are usually produced in water, hatch into tadpoles and breathe through gills. After metamorphosis, adults mainly breathe through the lungs, but most skin also has some breathing function. It mainly includes two kinds of animals: frogs and toads. There is no strict difference between these two animals, and some families have both. Generally speaking, toads live on land, so their skin is rough; Frogs are slim and good at swimming. The two bodies are similar, with inconspicuous necks and no ribs. The ulna and radius of the forelimb healed, the tibia and fibula of the hind limb healed, the claws could not rotate flexibly, but the limbs were muscular. ? Frog is the general name of amphibian Ranidae. Frogs in the north are commonly known as Daqingguai, formerly known as frog, green chicken, sitting fish, flounder and black frog. They are wild animals protected by the state, and everyone knows them from children to the elderly. Its population is widely distributed in the plains, hills and mountains of China, but the frog produced in the north has the best individual quality, and its dried fallopian tube product-gutter oil can also be used as fallopian tube oil. There are more than 4,800 kinds of frogs, most of which live in water, but some live in trees in the humid environment of the rainforest. Eggs are born in water, and some tree frogs can get through the tadpole stage by accumulating residual puddles in tree holes or plant leaf roots. In 2003, a new species of "purple frog" was discovered in western India. It lives in underground caves all the year round and only comes out to give birth when the monsoon brings rain. Recently, a "fluctuating frog" was found in Liwan District, Guangzhou City, Guangdong Province, but it looks like a toad.