The rain frog is a species of amphibian belonging to the rain frog family. It is distributed in the northern part of South Korea and Mongolia, the northeastern part of China, and the southern part of the Russian Far East. The adult male body length of the rain frog is 2.6 to 4.5 centimeters, and the adult female body length is 2.6 to 4.1 centimeters. However, the average body length of adult males is 3.1 centimeters, and the average body length of adult females is 3.5 centimeters. They have disc-shaped objects on their toes for climbing. This frog is able to lay eggs or fertilize at the age of 3 or 4. They feed on various insects, mainly searching for food at dawn and dusk, but if insects approach, they also feed during the day.

The toad has a sturdy body, a wide head, a wide mouth, and a round tip; Large and protruding eyes; The body is short and wide, the forelimbs are thick and long, the hind limbs are thick and short, and the left and right roots do not meet; The skin on the whole body is extremely rough, and the skin color on the back changes with the seasons, and females and males are different. During the reproductive season, the back of males is mostly black green, with light colored markings on the sides of the body; The female's dorsal color is lighter, with a milky yellow wart and sometimes black longitudinal spots running diagonally along the body from behind the eyes; The ventral surface is not smooth, with brown or black fine flower spots.

Black eyed toad, belonging to the family Bufonidae in the order Anura. The black eyed toad is relatively large, with a body length of 6-10 centimeters, and male toads are slightly smaller in size than female toads; Rough skin, mostly yellow brown or gray black on the back, with black brown mottled spots on the cloth; The abdomen is mostly milky yellow in color; The forelimbs are relatively slender, while the hind limbs are thicker and shorter, circular in shape, with only half fins and black fingertips. It is named after its appearance with black eye sockets.

The South China tree frog is mostly slender and flat in body, with long hind legs and large suction cups. It has developed fins between its fingers and toes, which can be used for gliding in the air. There are 10-12 genera and 200-300 species in the tree frog family, widely distributed in tropical and subtropical regions of Asia and Africa, and can also be seen on the island of Madagascar. The most famous South China tree frogs are several flying frogs in Asia, such as the black footed South China tree frog Rhacophorus nigropalmatus and the black webbed South China tree frog R Rewardti and others.

The breeding season of Japanese tree frogs is from April to August. At this time, male frogs migrate to still water areas such as low altitude rice paddies and wetlands to chirp loudly, laying about 250-800 eggs at a time. During the non breeding season, it often calls before rain and is a true rain frog.

The breeding season of Japanese tree frogs is from April to August. At this time, male frogs migrate to still water areas such as low altitude rice paddies and wetlands to chirp loudly, laying about 250-800 eggs at a time. During the non breeding season, it often calls before rain and is a true rain frog.

The Northeast Rain Frog (scientific name: Hyla japonica) is a species of amphibian in the Rain Frog family. Distributed in Hokkaido and Yakushima in Japan, as well as along the Heilongjiang River in North Korea and Northeast China, including Heilongjiang, Liaoning, Jilin, and Inner Mongolia. The type locality of this species is in Japan. In 1990, Japanese astronaut Toyohiro Akiyama brought some Northeastern rain frogs to the Soviet Union's Mir space station.

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.