Whooping cranes have made an astonishing comeback in North America, thanks in part to some bizarre conservation methods. Strange as it sounds, this elaborate game of role-play has helped establish a new flock of whooping cranes that migrates each year from Wisconsin to Florida. The people trying to save whooping cranes are now testing a new approach: They're matching some chicks with adult bird parents that can hopefully step in where humans are failing. In 1940, there were just 22 whooping cranes in the world.
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