Feral pigs and wild boar are difficult to differentiate. The US now has both (but had neither, historically) - and they interbreed. Both are considered invasive pests, but I have to point out that the Italians know how to cook them. Cinghiale. They make good salumi out of them too. (Salami is a subcategory of salumi.)
If wild pig and boar were legal to market in the US as they are in Europe, our pest issue with them would be solved. More wolves would help, also.
A reader sent me these pics: