You may not realize that your domestic cat is part of a worldwide epidemic that is responsible for the death of a staggering number of beneficial animals each year. We think of cats as going after mice and rats. We encourage feral cats into our farmlands and orchards to help rid us of those particular pests. The truth is much more devastating.
We think of invasive species as those living in an environment where they are not indigenous. We think of pythons running amok in the Florida Everglades. We think of certain species of carp, cane toads, and even rabbits as invasive. However, few species of animal have done as much ecological damage as has been done by domesticated cats each year.
If you have a cat, please consider keeping them indoors.