The Week in Animal News: Ringling Bros. Animal Abuse, Canadians Put Price Tag on Polar Bears, and More

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The owners of the Ringling Bros. traveling circus settled a U.S. Department of Agriculture dispute by agreeing to pay a $270,000 fine for mistreating its animal performers. But that's only a little more than half the worth of a polar bear, based on a new survey of Canadians.

We also have new thinking on invasive species, Berlin's wild inhabitants, a massive butterfly migration, and more in the Week in Animal News.