Interesting. I guess we don't want to bring back the Rocky Mountain locust. On the other hand, according to that Wiki article, they may not actually be extinc

Interesting. I guess we don't want to bring back the Rocky Mountain locust. On the other hand, according to that Wiki article, they may not actually be extinct, just morphed into some other form of grasshopper. Presumably there'd be predators (hawks, falcons, owls, eagles, snakes and other nest invaders, humans with shotguns) that would keep down the pigeon population. But, maybe not. Still, we need to try :)