FILE - This July 6, 2011, file photo shows a grizzly bear roaming near Beaver Lake in Yellowstone National Park, Wyo. The Montana Fish and Wildlife Committee is set to take a final vote on proposed rules to hunt grizzly bears if federal protections are lifted. (AP Photo/Jim Urquhart, File)
How a few strands of hair are helping to protect Canada’s grizzlies

Grizzly bears have lost about half their global range since the 1800s. Canada remains one of their last strongholds – though even there, they are considered “at risk.” In bear country in British Columbia, one wildlife ecologist is keeping tabs on the giants, by hunting for hair.

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Call to Earth 15 videos
FILE - This July 6, 2011, file photo shows a grizzly bear roaming near Beaver Lake in Yellowstone National Park, Wyo. The Montana Fish and Wildlife Committee is set to take a final vote on proposed rules to hunt grizzly bears if federal protections are lifted. (AP Photo/Jim Urquhart, File)
How a few strands of hair are helping to protect Canada’s grizzlies
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