Frogs are protected animals, belonging to the third level of protection, there are some species, such as the tiger frog belongs to the second level of protection, is prohibited by the state to kill. There are many kinds of frogs, and most of them can eliminate the pests in the farmland and forest, which is beneficial to us. However, in daily life, some people hunt and kill them at will and make them into delicacies, so now the ecological balance has been destroyed, thus there are more pests.

The frog belongs to the Chordata, Amphibia, Caudipterygium, Frogs, amphibians, adult tailless, eggs are laid in the water, fertilization in vitro, hatch into tadpoles, with gills to breathe, after the mutation, the adult mainly with lungs to breathe, and also use the skin to breathe. The upper jaw has teeth, usually with plow teeth. The shoulder girdle is solidly thoracic, the vertebrae are of a jagged type, the transverse processes of the sponsor vertebrae are columnar, and there is no intermediary cartilage between the two phalanges at the end of the fingers and toes. The tympanic membrane is obviously hidden under the skin, and the skin is smooth or warty. The tongue is generally long oval, and the posterior end is mostly notched.

Expanded Information

The frog's body can be divided into three parts: head, trunk and limbs. Frogs have four toes on the front feet and five toes on the back feet, as well as webbing. The frog has two slightly bulging pouches on either side of its head. Those are its eardrums, through which the frog can hear sounds. The frog's back is green, very smooth, soft, and patterned, and its belly is white. This allows it to hide in the grass, making it easier to catch pests and protect itself. Its skin also helps it breathe. It has an air sac that only male frogs have. The frog hunts with its tongue, which has mucus on it.