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Watch: Wild polar bear mother adopts orphaned cub in 'rare' occurrence - UPI.com
A team of Canadian researchers have documented a rare care of a female polar bear adopting an unrelated cub who was apparently orphaned.
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bbc.com
Polar bear mother adopts cub in rarely documented case
It's only the 13th known case of adoption out of the 4,600 bears studied for nearly five decades in the northern Canadian area.
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theguardian.com
Scientists confirm rare instance of polar bear mother adopting a cub – video
Only 13 instances of adoption have been recorded in western Hudson Bay polar bear population since studies began more than 45 years ago.
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Scientists log rare case of female polar bear adopting cub: ‘They’re really good moms’
Canadian researchers tracking bear known as X33991 noticed she had gained a second cub who likely needed help
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upi.com
Watch: Wild polar bear mother adopts orphaned cub in 'rare' occurrence - UPI.com
A team of Canadian researchers have documented a rare care of a female polar bear adopting an unrelated cub who was apparently orphaned.