From Wisconsin DNR:
Wildlife and agriculture officials take a stand in the mud to ferret out feral pigs from pockets of the Wisconsin countryside.
Feral pigs have gained a foothold in 23 states, including Wisconsin, mostly in Crawford and LaCrosse counties.
From California Fish and Wildlife:
The relationship between California residents and wild pigs could be described as “love/hate.” That is, hunters love them while everyone else seems to hate them. Classified as a game mammal in California, wild pigs provide year-round hunting opportunity.