Due to human destruction, with habitat loss and other factors. The percentage of endangered creatures on Earth is growing at an alarming rate. Before the industrial society, the birds on average every three hundred years one extinction, the beasts on average every 8000 years one extinction. But since industrialization, the rate of species extinction on Earth has exceeded the natural extinction rate by 1,000 times. One-eighth of the world's plants, one-fourth of the world's mammals, one-ninth of the world's birds, one-fifth of the world's reptiles, one-fourth of the world's amphibians, and one-third of the world's fish are on the brink of extinction.

Wild animals in the wild in addition to death from natural enemies, a significant portion of death from a variety of diseases, such as deer tuberculosis prevalence is not low. Wildlife viscera, blood and even muscle contains a variety of viruses, parasites, some even at high temperatures can not be killed or removed. Eating wild animals can cause hemorrhagic fever, psittacosis, rabbit fever, encephalocysticercosis, schistosomiasis, schistosoma haematobium, intestinal parasitosis, etc. People often drink snake blood and snake bile wine, and snake body poison a lot, nerve poison will lead to paralysis of the limbs, blood poison can make people bleed more than. In addition to having many of the same parasites as snakes, snappers also have a parasite that is not found in other animals - leeches. This parasite will lay eggs in the body of the snapper, if raw food snapper blood, bile is easy to bring into the body along with these eggs, resulting in poisoning or severe anemia.

In addition, there have been a number of cases in China where trappers have poisoned wild animals with highly toxic pesticides, all in order to sell them to restaurants for money. There are also people who poisoned pheasants and rabbits and then supplemented with a shot to deceive consumers. This kind of wildlife is even more harmful to the human body. In addition, the consumption of wild animals is, after all, a minority of people, often can not find the cause of the disease.