https://en.wikipedia.org/wiki/Cat_predation_on_wildlife https://en.wikipedia.org/wiki/Cat_predation_on_wildlife "As an invasive species and superpredator, they

https://en.wikipedia.org/wiki/Cat_predation_on_wildlife https://en.wikipedia.org/wiki/Cat_predation_on_wildlife "As an invasive species and superpredator, they do considerable ecological damage. In Australia, hunting by cats helped to drive at least 20 native mammals to extinction, and continues to threaten at least 124 more. Their introduction has caused the extinction of at least 33 endemic species on islands throughout the world. Feral and domestic cats kill billions of birds in the United States every year, where songbird populations continue to decline."