Wild pigs invade Canadian provinces—an emerging crisis for agriculture and the environment

… spreading rapidly across Canada, threatening native species such as … early 1990s to diversify Canadian livestock production. Others … had spread exponentially across Canada, from British Columbia … piglets, roaming in Saskatchewan, Canada. Credit: Ryan Brook, …… spreading rapidly across Canada, threatening native species such as … early 1990s to diversify Canadian livestock production. Others … had spread exponentially across Canada, from British Columbia … piglets, roaming in Saskatchewan, Canada. Credit: Ryan Brook, …