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.