All of the feral hogs (wild pigs) found in the United States belong to the same genus and species, Sus scrofa. Two types of Sus scrofa, Eurasian wild boar and domestic swine, were introduced into the United States. Because these two types belong to the same species interbreeding has occurred. Presently, there are three types of wild Sus scrofa in the United States: Eurasian wild boar, feral hogs (i.e., wild pigs that are solely of domestic ancestry), and hybrids between these two types.