Kitty eco threat.
There's a fellow in New Zealand that wants to eradicate cats on the island nation. Sounds like a meanie, doesn't he?
But he's not proposing that people kill them. He just wants them all neutered, and no feral cats. His reasoning is that originally, New Zealand was teaming with birds that had no natural predators. Man's introduction of the friendly housecat caused kiwis and penguins and other ground birds to be endangered, but also the song birds, too.
My house regularly has feathers in it, from my rescued semi-feral cat, TC. He is lovable and friendly, and a stone cold bird assassin. I seriously consider having his front claws removed. I will not abide a cat box in my house. I am part of the problem.
Feral cat colonies are a HUGE problem. When we permit them to exist, we permit the devastation to the local ecology. While the catch-neuter-release programs are good ideas, they cost a lot, and thus rarely get properly implemented. Their proponents put forth the silly assertion that straightforward extermination doesn't work in reducing the problem.
Food for thought, from a cat owner.