TIL: house cats are already responsible for the extinction of at least 33 species, and are threatening hundreds more. They are the #1 killer of birds and small mammals, killing ~4 billion animals each year just in the US alone.

Previously, I was against locking cats indoors and preventing them from hunting. Having learned that they're one of the most dangerously invasive species on Earth for native wildlife, I'm not sure about that anymore.

The saddest part of the story to me, however, is that well-fed house cats don't even kill for food, but merely for sports.

@raucao I had no idea it was in such this magnitude.

@hugo Yeah, the numbers are pretty insane. Never expected this. Got tipped off by the Ashes Ashes episode about the currently ongoing mass extinction.

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