Species invasions are actually a very common occurrence on a global scale. Although there are countless species of organisms on the planet, these are distributed all over the world, with some species being endemic to certain areas and not present in others, and others having a relatively wide distribution. When some species appear in places where they would not have previously existed, this is when the species may become invasive.

Poaching. As long as the tiger is always around a poaching problem, because since ancient times, the idea that the tiger is a treasure has been deeply rooted

The local authorities in Japan subsequently conducted a DNA survey of all the monkeys in the zoo and confirmed that 57 of the 167 monkeys were hybrids of macaques crossed with a specific exotic creature, the rhesus macaque, accounting for about one-third of the monkey population