Northern states are implementing measures to prevent the spread of invasive "super pigs" from Canada, which are a crossbreed of wild boar and domestic swine, causing significant ecological and agricultural damage.
The nation's six million feral pigs are destroying crops and preying on endangered species. But the most serious threat they pose is to human health.
One of the most destructive and rapidly spreading invasive species on the continent has been found for the first time in a Canadian national park.
'There's nothing good about them.' They carry disease and cause billions in damage
Observations From Members 