Where Canada's 'super pigs' are most likely to invade the US — and potentially cause millions of dollars in damage

• Researchers say Canadian super pigs, a cross of between domestic pigs and wild boars, could invade the US.
• They can withstand more cold than wild hogs, which already cause billions in damage in the South.
• Areas of four northern US states are the most likely to be invaded by super pigs, a new study found.

Researchers have warned that Canadian "super pigs" could soon invade the US, potentially causing millions of dollars in damage — and four states in particular are especially at risk.