When a toad is attacked or strongly stimulated, its skin, especially a pair of posterior ear glands on its head, will release a milky liquid. In addition, the round protrusions on the skin are composed of many skin glands similar to the posterior ear glands. Besides glands that secrete mucus to keep the skin moist, there are also glands that secrete milky white liquid. The milky liquid is poisonous, which is a weapon used by toads to defend themselves, but this weak toxicity is useless to people. If you get it on your hands or skin, it has no effect at all. If you put it in your eye, you will feel pain. As long as it is washed with clear water immediately, there is not much harm. We hold the toad in our hands, and if we don't hurt it strongly, it won't release its venom easily.

The scientific name of toad is toad, which is an amphibian in the subphylum of vertebrates. The so-called amphibians can live both on land and in water.

Toads are bumpy all over, and they often make ugly cries together during the breeding season, which makes people feel very unhappy at the sight of toads. Toad is ugly, but it's not bad.

Toads are experts in eating harmful insects. A large toad living in Central America and South America has made great contributions to exterminating pests for many times. This big toad is 25 cm long, 12 cm wide and weighs 1 kg. Its main food is some insects harmful to tropical crops. /kloc-in the 0/9th century, tropical crops in the West Indies were attacked by pests, and this big toad was transported there, where it preyed and propagated, and the local pests were completely eliminated. In 1930s, 65,438+050 big toads were transported by plane to Hawaii Islands to protect the sugarcane fields there. A few years later, the toad multiplied rapidly and successfully completed the task. Later, the descendants of these big toads bred in Hawaii were transported to the Philippines, New Guinea, Australia and other areas with tropical crops. The toad also performed well, creating brilliant achievements in eliminating pests.

To understand the good things toad has done to mankind, should we change our impression of it? In fact, the acne on its skin is just some skin glands that can secrete mucus, which can always keep the skin moist. Some papules may also secrete venom, which is mainly used to deal with pests. There is a gland behind toad's ear, which can secrete a substance called toad venom and can be processed into medicine.