No kidding... wood pigeons are evolving in real time on my office window ledge.
I have sunflower seeds out for the songbirds, and get lots visiting. This also means that I have to scare the pigeons away as they nick all the food given half a chance.
There's one - I call it the stealth pigeon - that, unlike all the others, can land silently on the window ledge, and then flatten itself down so that it's below my line of sight when I'm sitting at the computer. I had no idea it was there until I happened to stand up one time, and then I saw what looked like a flat pigeon - scoffing down the seeds.
My OH just laughed at me when I described it (admittedly it sounds very unlikely) but then she saw the fat fucker doing it herself.
That's one smart pigeon. They all look in through the window when they arrive because they know I'll shoo them away, but that one is simply cunning.