European birds have faded due to the climate crisis.

The colorful plumage of European birds has faded over the past 15 years due to climate change. This can lead to problems during the mating season - the bright color of birds attracted partners. Color changes can be caused by a combination of a 1.23°C increase in temperature and a 0.64 mm decrease in rainfall. Becoming less bright, the birds adapted to the new environmental conditions. They may now have to change their breeding strategy.