We all know, of course, that passenger pigeons are extinct. Hunted to death. That's bad enough, but I only just recently found out the sordid facts. They didn't just fade away gradually, with people becoming accustomed to ever smaller flocks. No, the last large flock was deliberately killed by hunters, even as they knew it was the only remaining flock of that size.
What can you even say to that?
What can you even say to that?