Birds could all end up with large beaks due to climate change.
Scientists at the University of Sheffield have warned that birds are adapting to global warming by developing big beaks and losing distinct characteristics and fear that both small and large creatures are at the risk of extinction.
The experts say that birds with unique traits that benefit the human race could go extinct, which could have a devastating ecological impact.
Lead author Dr. Emma Hughes said: "As species go extinct you expect the traits that they represent to also be lost.
"But what we found was that with morphological diversity, the traits were lost at a much, much greater rate than just species loss could predict.
"This is really important because that can lead to a major loss of ecological strategies and functions."