When I was a kid, I had a cat (“Tac”, a white cat who adopted us when we lived in Cornwall) and I adored it. It pained me every time she caught a bird, or mouse, or mole. Especially when she left the remains on the doormat. I lived in New Zealand and Australia for about a decade and didn’t have a cat there, but I saw how the native wildlife was no match for the cats. At least in Melbourne, cats had to be kept in at night, but in most places in the world they are free to roam and kill millions of birds and small animals.
We have a dog now. The only thing he kills is flies. If you have a cat, the birdsbesafe collar could be worth a try.