Humans May Be Influencing Bird Evolution in Their Backyards – Scientific American

“If that part of the story is true, it tells us that humans have actually been the selective agents, which [have] caused this evolutionary change in great tits.”

via Humans May Be Influencing Bird Evolution in Their Backyards – Scientific American

It is interesting to be able to observe changes like this happening even during human lifetimes, and to be able to understand the reasoning and the science behind these changes.