The disappearance of jackals is caused by many reasons.
1. Jackals like to prey on ungulates, such as cattle, pigs and deer. Similarly, humans also like to hunt ungulates, and the increase of human activities has greatly reduced the habitat of jackals.
2. Jackals are susceptible to different infectious diseases, especially where they live with other canines.
3. People hunt. According to Tang Herbal Records, jackals are traditional Chinese medicines, which have the functions of tonifying deficiency, dispersing stagnation, removing blood stasis and reducing swelling. So some people set their eyes on this huge market and began to kill jackals.
The ecological chain is a one-off existence. When the number of jackals drops sharply, the number of jackals will increase sharply due to the threat of a natural enemy, but the sudden addition of a species, such as wild boar, will definitely have an impact.
Wild boar has strong adaptability to the environment, from semi-arid climate to tropical rain forest, semi-desert and even grassland. Moreover, wild boar is an omnivore. It will eat tender leaves, nuts, grass roots and even animal carcasses. The reproductive ability of wild boar is particularly strong, and it can breed 4 to 1 1 cub a year.
Except jackals, tigers, wolves, bears, leopards, etc. Are natural enemies of wild boar. However, in recent years, due to the decrease of habitats and the wanton killing by human beings, they have become the key protected animals of the country.