Feral Cats Are An Invasive Species in North America (and elsewhere)
10,000 Birds
JULY 22, 2014
This is approximated by the size of the animal, but really, this has to be adjusted for depending on modality of killing. You can make a similar map for the small carnivores, the Mustelids, such as minks, ermines, otters, etc. Also, feral Cats on islands seem to be a serious problem, causing the extirpation of some indigenous species.
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