Outdoor domestic cats are a recognized threat to global biodiversity. The American Bird Conservancy estimates that cats kill 2.4 billion birds a year in the United States alone.
Cats have contributed to the extinction of 33 species and continue to adversely impact a wide variety of other species. The ecological dangers are so critical that the International Union for the Conservation of Nature lists domestic cats as one of the world’s worst non-native invasive species.
The American Humane Association and the Humane Society of the United States both provide information to help you decide if your feline should stay indoors and how to keep your kitty help there!