People may let their cats outside to let it roam freely and stay amused. Unfortunately, outdoor cats kill up to ten times more wildlife than natural predators. That means ordinary cats can wipe out wildlife in an area within a short period of time.

If you don’t think your cat is a killer, think again. A team from North Carolina State University and the North Carolina Museum of Natural Sciences gathered statistics from 925 domestic cats, primarily residents of the US, UK, Australia and New Zealand, and found that cats kill an average of 11.6 prey every month, which can add up to a lot of innocent birds and other animals besides rodents getting killed.

To protect birds, keep cats inside or build them a catio so they can enjoy the great outdoors without killing other animals in the process.

To learn more about how cats are killing machines, click here.