Until now, exotic species that have invaded Minnesota have been mostly smaller critters like zebra mussels, bighead carp or spiny water fleas.
But state officials are on the lookout for a much larger ominous invader spotted last week near Detroit Lakes: A wild boar.
"Several witnesses saw it, and their descriptions were the same," said Joe Stattelman, Department of Natural Resources conservation officer. "It's smaller than a Labrador retriever, has dark long hair, a slanted snout and visible white tusks. It sounds like a wild pig to us."
Specifically, a European wild boar, said Earl Johnson, DNR wildlife manager in Detroit Lakes.
And that's a major concern, he said.
Boars and feral pigs can multiply rapidly, spread diseases to wild and domestic animals and are destructive to the landscape. Wisconsin, which has feral pigs, asks hunters to shoot them on sight.
Until now, they had not been spotted in Minnesota, and officials desperately want to keep it that way.
"It scares me," said Johnson. "They root up vegetation. They literally tear up the woods, opening it up to erosion." They can damage habitat for deer, turkey and ruffed grouse and affect other wildlife, he said. They'll also eat and destroy crops and gardens.