When they dig up the ground for roots, they kill many native plants. When they wallow near the edge of a pond, they tear up the water plants. Wild boars get into gardens and eat all the corn and potatoes. They kill and eat small native animals, including endangered species, like baby sea turtles. Also, they eat the acorns that deer and turkey need for food.
Boars have very few natural predators.
Because of this, boars are often hunted to keep them from damaging the environment around them. Complete Guide to Game Animals . Grolier Book Clubs, Inc. 1986. John O. Jr. The Audubon Society Field Guide to North American Mammals . HYPP Zoology Home Page.