Precisely! The people reiterating that study also acts like it is valid all around the world, including places where cats are not invasive. For example in mainl

Precisely! The people reiterating that study also acts like it is valid all around the world, including places where cats are not invasive. For example in mainland and southern Europe the cat has been tamed since at least 1200 BC and the wild cat has been since the ice age. Birds in those areas have long since adapted, as evident by the wild cat which predominately hunts ground-dwelling mammals. It is of course a good argument to consider the study generally valid on e.g. the British isles and North America where the cat was more recently introduced into the fauna.