A cross between a domestic pig and wild boar was bred in Canada decades ago.
and crops."They are the worst invasive large mammal on the planet. Period," Ryan Brook, a wildlife researcher and professor at the University of Saskatchewan who has studied the pigs for more than a decade, told Insider.
But as the boars started popping up on farms across Canada, they were crossbred with domestic pigs to make the swine bigger and more prolific. The new pigs could also grow thick furry coats, equipping them to survive the exceptionally cold Canadian winters, which can bring weeks of negative double-digit temperatures.desirable for the meat market also made them a nightmare once they escaped.
Then the boar market peaked, collapsing in 2001, and many of the pigs were simply let go. Brook said there are known occurrences of more than 300 pigs being released at one time. Others escaped, as the pigs were stronger and more adept at getting around fencing. They prey on native species like frogs and salamanders, and the nests of ground-nesting birds, like ducks and geese. They've even been found with white-tailed deer in their stomachs.
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