Frogs (a species of amphibian in the family Ranidae) have a slightly triangular head that grows wider; large and protruding eyes; short forelimbs, blunt toes, short and thick hind limbs, and almost full webbed toes; and a rough back. They are most common and abundant in plains and hilly areas from North China to South China, suitable for living in amphibious environments. They often inhabit low-lying and humid places such as rivers, ponds, streams, ditches, lakes, and shallow waters with dense aquatic vegetation. They are active during the day and night, searching for food at night. They are carnivorous and usually prey on small insects, but can also swallow fish meat and the organs of chickens, ducks, and fish.

The Japanese forest frog (scientific name: Rana japonica) is a species of amphibian in the family Ranidae. Male frogs have a body length of 34-59mm, while female frogs have a body length of 39-67mm. Head length is greater than width; The snout end is blunt and pointed, located in the lower jaw. The snout edge is blunt, and the cheek is slightly inclined outward. The cheek surface is concave, and the nose is located between the snout and eyes. Near the snout end, the distance between the eyes is smaller than the distance between the nose, and the temporal folds are thin and weak. The eardrum is large and round. The plow bone teeth are located between the internal nostrils, sloping backwards towards the midline without touching each other. The tongue is oval in shape, with a free posterior end and deep incisions.

Frogs are amphibians of the genus Frogaceae. [14] Their heads are slightly triangular and longer than wide. Large and protruding eyes; The forelimbs are short, the toes are blunt, the hind limbs are short and thick, and the toes are almost completely webbed. The back is rough, blue-green, yellow-green, dark green, gray-green, taupe, etc. in life, with irregular black spots, and white ventral skin, smooth, without spots.