Swallows Seem To Be Evolving to Avoid Cars

[Napoléon]

That's not evolution, their wings have not been permanently shortened

No shit Sherlock, nothing is permanent that's the whole point of it being evolution in action.

if the environment suddenly changed back to how it traditionally was their wings could go back to the way they were.

And how does this have any bearing on whether it is evolution or not? Say it did go back, and their wings did change again, it would still be evolution. Hell it would simply make evolution more obvious.