Free Range Hunters Species Wildlife 
10,000 Birds
OCTOBER 25, 2016
Agonizing quandaries concerning invasive species are well-known to wildlife biologists. 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.”.
10,000 Birds
SEPTEMBER 16, 2014
According to the US Fish and Wildlife Service , there are about 10 billion breeding birds in the US. A recent meta study ( The impact of free-ranging domestic cats on wildlife of the United States ) that applied strict inclusion criteria and some fancy statistics estimates that 2.4 So keep that in mind.
10,000 Birds
JULY 22, 2014
This almost certainly can be argued to be true just on the basis of logic, because feral Cats are proficient hunters and are entirely out of ecological place. Also, feral Cats on islands seem to be a serious problem, causing the extirpation of some indigenous species. We estimate that free-ranging domestic cats kill 1.4–3.7
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