How Cats Impact Wildlife
Domestic cats (Felis catus) can make wonderful pets – but allowed to roam outdoors, they pose a threat to wildlife.
Outdoor cats kill an estimated 2.4 billion birds each year in the U.S. alone, making cats the top source of direct, human-caused bird mortality in the U.S. They have contributed to the extinction of 63 species of birds, mammals, and reptiles.
Cats are not native to North America and are recognized as an invasive species by the U.S. Department of Agriculture. Even brief outdoor time can have outsized effects on local wildlife. In the United States, free‑roaming cats kill billions of birds and small animals each year.