Even still, among the populations of birds not adapting to the city, they are being forcibly adapted in other ways. If the reach is too big, they die.
This is how evolution works, and has always worked. The world shifts, and those who can handle it thrive, while those who can't, suffer. It's the reason mammals are running the planet today when it was lizards just a couple million years ago.
Wow, such rude projection, coupled with bizarre strawmen and an apparent complete lack of understanding of what "zero-sum" means even after I explained the sense in which I was using it.
It seems to be a thing with them, e.g., "In what world do you think our energy needs plateau? [total misrepresentation of what their correspondent said] I'm always so surprised to see this 1970s hippie attitude making a comeback, especially since it makes less sense today than ever before."
I think you might be a bit out of your depth here. You really seem to not know much about evolution.
Roughly half of the shifts in the last 11 evolutionary periods, over the last 500 million years, were caused by changes that occurred in a-few-hours-to-a-few-thousand-years with 75%-90% species lost.
Evolution did not fail to work then.
