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Are there so many birds that cats don’t matter?

10,000 Birds

If cats displace ferrets, then that probably means that birds are getting hit harder than rodents, and among birds, adult birds are getting hit harder than eggs or hatchlings. Other felids are all much larger, the similar sized carnivores are things like minks and ferrets, and they have very different habits.

Cats 176
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Feral Cats Are An Invasive Species in North America (and elsewhere)

10,000 Birds

The number of birds, and other animals, killed by feral Cats is probably large , but it either varies a great deal from place to place, or the estimates are so inaccurate that they, the estimates themselves, vary a great deal from place to place. We do know this: In areas where feral cat populations exist, they are often well established.