Croydon, New Hampshire has a population of wild European wild boar & they have been there since the early 1900's. They are escapees from a huge game ranch up there. Virginia has a population of wild boar stocked by the Game & Fish dept. years ago but you cannot run them with dogs.
Lower Michigan has a population of European boar that are escapees from a game ranch.
Most of the natural migration are helped a long by people.
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