Polar Bear Adopts Orphaned Cub in Rare Arctic Rescue

When researchers first spotted polar bear X33991 emerging from her den last spring near Churchill, Manitoba, she had one tagged cub by her side. Months later, she reappeared with a surprise: a second baby bear in tow.

Scientists confirmed through genetic testing that the new cub isn't biologically hers. X33991, just 5 years old herself, had adopted an extra baby somewhere along her travels across the frozen landscape.

This marks only the 13th known adoption case among the Western Hudson Bay polar bear population in over 45 years of research. During that time, scientists have tracked more than 4,600 individual bears, making this subgroup one of the most studied in the world.

The adopted cub's biological mother remains a mystery. She may have died, or the cubs might have simply gotten mixed up between litters, which occasionally happens on the tundra.

"We really think it's just because they're so maternally charged and such good mothers, and they can't leave a cub crying on the tundra, so they pick them up and take them along with them," said Evan Richardson, a scientist with Canada's environment and climate change department.

The adoption dramatically improves the orphaned cub's survival odds. Only about half of all polar bear cubs make it past their first year of life.

Why This Inspires

Polar bear cubs spend just two to two and a half years with their mothers, but that short window is packed with critical lessons. They learn how to hunt seals, navigate sea ice, and survive the harsh Arctic environment.

Now X33991 is teaching both cubs, estimated to be about 10 or 11 months old, these essential skills out on the sea ice. The fact that the adopted cub gets this chance at a proper polar bear education gives it a real shot at reaching adulthood.

"It's just another reason why the species is so incredible, why they're so fascinating and interesting," said Alysa McCall, director of conservation outreach at Polar Bears International. "It gives you a lot of hope when you realize that polar bears maybe are looking out for each other out there."

You can track X33991 and her two cubs online as they journey across Western Hudson Bay, hunting and growing together as a family.