The American bullfrog, commonly known as the American water frog, is a large edible frog. It is native to the region east of the Rocky Mountains of North America, north to Canada and south to northern Florida. The body length can reach 20cm and the weight exceeds 0.5kg. The back and limbs are usually greenish brown with dark brown markings. The adaptability is extremely strong and has been introduced all over the world, including China, parts of Europe, South America and other parts of Asia. It mainly inhabits in still water environments, such as ponds, lakes and swamps. It feeds on insects, small fish, other frogs, and even small mammals. It has been listed as one of the world's 100 most dangerous invasive alien species ".

The African bullfrog is a member of the family Ranidae in the order Anura. Also known as African bullfrog. Large and bulky in size; Wide head and large mouth; Thick hind limbs; There are hard wart particles on the hind toe. The body color is olive green, with dark green, brown, or black stripes or spots along the skin ridges. It is the largest frog in the world. The African bullfrog is distributed south of the Sahara Desert in Africa. Habitat in tropical and subtropical savannas, wet grasslands, shrubs, intermittent freshwater lakes, swamps, farmland, pastures, canals, and ditches. Highly aggressive, heat-resistant but not cold resistant. Mainly feeds on insects, birds, small reptiles, amphibians, rodents, etc.

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.