Until now, most people have likely regarded bird-feeders as merely a pleasant addition to their gardens. But scientists have now discovered that bird-feeders in the UK are actually having a serious long term impact on bird life – they’ve found that the feeders have brought about the first evolutionary step in the creation of a brand new species.
Historically, European Blackcap birds migrate to Spain to spend their winters, where they feed on fruit and berries. While in the past the part of the population that accidentally flew to the UK had a hard time surviving, since the rise of bird–feeders in the UK things changed.
The food supplied by animal-loving Brits, along with the luxury of not flying over the Alps, have made Britain an increasingly popular holiday destination for wintering blackcaps. And that has set them down the path towards becoming two separate species, Gregor Rolshausen from the University of Freiborg and colleagues write in the journal Current Biology.