> [Feral pigs] are invasive and cause millions of dollars in agricultural damage each year, rooting and trampling through a wide variety of crops. They prey on everything from rodents, to deer, to endangered loggerhead sea turtles, threatening to reduce the diversity of native species. They disrupt habitats. They damage archaeological sites. They are capable of transmitting diseases to domestic animals and humans.
https://www.smithsonianmag.com/smart-news/feral-pigs-are-inv...
> Interestingly, in their native range in Europe and Asia, pigs do not cause as much ecological damage. In fact, some studies indicate that they may modify habitat in important ways for species that have evolved with them, such as frogs and salamanders.
https://theconversation.com/feral-pigs-harm-wildlife-and-bio...