Live in Sweden and have 3 cats. Two are outdoor cats and one wanted to be an outdoor cat but he kinda realised he is fat and lazy and wants to stay home. So this felt very accurate for the cats who live with me!
Oh and in Sweden all cats are tagged and registered in case any should go missing. I could not imagine a world where I would deny my cats the right to go outside. Then again I did move to the countryside just so my cats could have a better life far away from traffic.
The damage done by cats is part of the human related harm. The cats did not relocate of their own volition. We put them there.
If you think any animal small enough to fit in a cats mouth is "some dumb bird," then I gotta say Mr. Random Dumb Ape, you sound like you would lose an intelligence test to the bird
Cats ranking on a nonexistent list of """most invasive""" doesnt matter.
Cats degree of invasion is directly controlled by humans. They are, arguably, an extention of us outside of their native ranges.
Reducing the impact of cat damage is a direct reduction of human damage. Because the cat was only able to do any damage at all because you let it go outside unsupervised.
Well if some dude went around climbing trees, destroying nests and killing the native birds people would probably complain. The harm humans cause is due to their pets too, cats wouldn't be where they are without humans. When there are too many outdoor cats in an area they breed a lot and effect bird populations which effects other parts of the ecosystem. Idk if it needs to be illegal but if it's discouraged the numbers of cats killing off birds can be reduced. If people can teach their cats not to eat birds then maybe it would be fine.
I feel like this line of reasoning works for all pets. Like tigers, who cares about some dumb mammals. Also the damage cats do the ecosystems is part of the harm humans do.