It’s an Obama world. Now the progressive loons want “policy
intervention” to protect mice from cats. A recent study found
that cats are killing mice at an astonishing rate. Anthropogenic
threats, such as collisions with man-made structures, vehicles,
poisoning and predation by domestic pets, combine to kill
billions of wildlife annually. Free-ranging domestic cats have
been introduced globally and have contributed to multiple
wildlife extinctions on islands. The magnitude of mortality they
cause in mainland areas remains speculative, with large-scale
estimates based on non-systematic analyses and little
consideration of scientific data. Here we conduct a systematic
review and quantitatively estimate mortality caused by cats in
the United States. We estimate that free-ranging domestic cats
kill 1.4–3.7 billion birds and 6.9–20.7 billion mammals
annually. Un-owned cats, as opposed to owned pets, cause the
majority of this mortality. Our findings suggest that free-
ranging cats cause substantially greater wildlif