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Cat Wars: The Devastating Consequences of a Cuddly Killer

10,000 Birds

They argue for the elimination of free-range cats entirely. Arriving in North America around the time of Columbus, they have become “one of the most successful invasive species on earth.”. There is evidence that toxoplasma leads, in humans, to an elevated risk of mental illness and depression.

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Feral Cats Are An Invasive Species in North America (and elsewhere)

10,000 Birds

It was not a kitty cat, even though all of its relatives in the Americas were. But they don’t live in North America. I find it astonishing that people argue of whether feral cats are bad for birds in North America. In North America, you’ve got Bears at the large end, Cats in the middle, and at the smaller end, the Mustilids.