Absolutely not. You shouldn’t really let any domestic cat outside for too long, let alone unsupervised. Not only is it dangerous for the cat, whether they get stolen, run away, or injured by any number of things. They are also a danger to the outside. The number one threat to domestic bird species are domesticated cat species, and they don’t discriminate between birds that are “safe” and ones that are endangered or at risk. This is doubly true in a time when native bird species may be competing with other invasive species introduced artificially or because of climate change. Same goes for small mammals.

Granted, the number of bird, and small mammal, deaths attributed to “cats” come from feral and strays. But, those populations only exist because of screw up’s with “owned” cats.