It is named after its loud sound, and its sound resembles Niu Jiao, hence the name bullfrog.

1, bullfrog

Bullfrog, also known as bullfrog toad, is a large amphibian of Ranidae. They are mainly distributed in East Asia, including China, Japanese, Korean and other countries.

Bullfrog is a large frog with strong hind legs, and its body length can reach about 15-20 cm. Their backs are dark green or brown, and there are obvious spots or stripes on their bodies, which helps them to disguise themselves in the natural environment. Bullfrog's hind legs are very strong and adapt to jumping and swimming.

Unlike many other frogs, the bullfrog is Nocturnal Animals, which is mainly active at night. They feed on insects, small invertebrates and small fish and catch prey with their tongues. The bullfrog's cry was deep and powerful, echoing all night.

In China, bullfrog is also used as food because of its fat meat, especially in some local dishes. In terms of protection, bullfrogs are also protected in some areas to maintain the population.

It should be noted that bullfrogs have high requirements on the environment, including humidity and water quality, so it is necessary to provide a suitable environment when raising or breeding bullfrogs to ensure their health and survival.

2. Frogs

Frog is an animal of Diptera and an amphibian. They belong to the "frog" group in biological classification, including many kinds of frogs and toads. Frogs are widely distributed all over the world, from tropical rain forests to cold arctic regions.

Frogs usually have the following characteristics: developed limbs, uneven abdominal skin, no tail, flat head and wide mouth. Their skin usually contains mucus, which can absorb oxygen and moisture. Frogs' hind limbs are longer and stronger than their forelimbs, which enables them to jump and swim.

Frogs have different lifestyles. Most frogs are semi-aquatic or aquatic, live in water and breathe from it. During breeding, they tend to be close to water sources for spawning and hatching. Frog larvae are tadpoles, which undergo metamorphosis at tadpole stage and gradually transform into adult frogs.