Using citizen science data from bird counts in Europe and North America, a researcher from the U.K. devised a way to illustrate the loss of bird species over the years. Simon Butler, a conservation biologist at the University of East Anglia in Norwich, used the numbers to reconstruct soundscapes at 200,000 different locations over time to show how the sounds of nature have changed. He says across the board, our soundscapes are quieter, less varied and not as interesting than they used to be. His findings were published in the journal Nature Communications. (Audio from Butler’s soundscapes courtesy of Xeno-Canto.)