In Australia and many parts of the world, people are claiming that cats are decimating wildlife to the point of extinction. While it’s true that cats do kill birds and rodents, it’s not clear that cats are wiping out entire species alone.
Cats are predators and fit within the ecological balance. So while keeping cats indoors or confined can help protect wildlife, there’s no hard evidence that cats are single-handedly responsible for wiping out wildlife. Still you can do your part by keeping your cat isolated from wildlife such as birds. Then let your cat attack rodents since nobody seems too concerned about saving the lives of mice in a home.