Bird feeders might be changing bird beaks
Bird beaks might be evolving to better fit bird feeders. A study of great tits in the UK, where feeders are common, found the bird's beaks have grown over the last 26 years, that British birds had longer beaks than those in the Netherlands, and that birds with genes for longer beaks were more likely to visit feeders, per Science News.
Why it matters: Scientists have known that environmental changes, like El Niño, can influence the evolution of animals. Now, it appears something as simple as bird feeders can do the same.