How many birds do cats kill in Australia? is a question that has been the subject of much debate and research. Cats are known to be predators, and they have been introduced to Australia, where they have no natural predators. As a result, they have had a devastating impact on native bird populations.
A study by the University of New South Wales found that cats kill an estimated 390 million birds in Australia each year. This includes both native and introduced species. The study also found that cats are responsible for the extinction of at least 20 native bird species in Australia.