What do bison, beaver, wolves and sea otters all have in common?
They鈥檙e keystone species. That means they have an outsized impact on their ecosystem.听It took humans driving some of these to near extinction to realize just how important they are.
Now animals like the听American Bison听and听North American Beaver听are some of the Endangered Species Act鈥檚 most notable听success stories.听听
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