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Cat Wars: The Devastating Consequences of a Cuddly Killer

10,000 Birds

The relevant numbers involving cats, the people that cherish them, and the birds (and small mammals and reptiles) that they kill are all too large to mean much; you might as well use the funny word “gazillions.” Arriving in North America around the time of Columbus, they have become “one of the most successful invasive species on earth.”.