Hybrid hogs — a genetic blend of wild boars and domestic pigs — rocked up in Canadian farms around 30 years ago in an attempt to spice up the country’s livestock produce. Over the past three decades, countless numbers of them have escaped and bred like crazy, earning themselves the title of the most prolific invasive mammal in Canada.
The wild pigs are the descendants of domestic pigs (Sus scrofa domesticus), Eurasian wild boar (S. scrofa scrofa), or hybrids of the two.
As their name suggests, Eurasian wild boars and their domesticated subspecies are not native to North America but were introduced by European settlers in the 16th century. Over the next four centuries, many more were introduced into parts of the US and Canada for sport hunting, before being let loose into the wild.
The
The resulting pigs were quite remarkable: they were super-smart, large, purportedly delicious, and perfectly suited for the harsh Canadian winters. However, the market for boar pork delicacies slumped, so herds of the
They proved to be a formidably invasive species. The wild pigs hunted native animals, such as turkeys and game birds, and preyed on young livestock like lambs, kids, and calves. Simultaneously, they would strip the land of berries, roots, bark, and any form of vegetation, leaving little for grazing animals and black bears.
On top of that, wild pigs are the hosts of over 30 significant viral and bacterial pathogens, as well as more than 37 species of parasites, which can pose a threat to humans and other animals.
As prolific breeders with a lack of natural predators, their numbers were able to boom rapidly. A
“Wild pigs are ecological train wrecks. They are prolific breeders making them an extremely successful invasive species,” said study author Ruth Aschim in a
“The growing wild pig population is not an ecological disaster waiting to happen—it is already happening,” added Ryan Brook, lead researcher for the Canadian Wild Pig Project.
“This is a rapidly emerging crisis.”
Some provinces of Canada have taken action against the invasion. As of January 1, 2024, the importation, possession, transport, propagation, buying, selling, and trading of live Eurasian wild boar and their hybrids is banned in Ontario, according to the
Over in Alberta, provincial governments have
“What happens is if a hunter goes in and removes one or two individuals, the remaining pigs learn from that experience to avoid humans. They will avoid being hunted or trapped by humans – they’ll go nocturnal, they’ll disperse,” Megan Evans, executive director of the Alberta Invasive Species Council,
“These are really smart animals, we all know
Canada’s pig problem still squeals on, but they are not alone in their woes. A recent report estimated that there are