New Zealand is known for its rare and unique birds. But invasive animals, brought by humans, have decimated those species. To save them, New Zealand has set a goal of exterminating millions of those invasive predators by 2050. And everyday people are joining in. Some trap and kill animals in their backyards. Student groups help kill predators in neighborhood parks. It's not for the faint of heart, but it's part of a larger ethos of conservation that's spreading.
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