"Great app with a certain addictiveness," writes a user in the Google Play Store about BirdNET. The app was developed by Chemnitz University of Technology and Cornell University (USA) and can identify 3,000 bird species based on their song using an AI algorithm. The app has now been downloaded over one million times from the Google Play Store. With over 5,200 reviews, it has a current score of 4.6 out of 5. "An incredible success," says Dr. Stefan Kahl delightedly. He is a researcher at the Chair of Media Informatics (headed by Prof. Dr. Maximilian Eibl) and at the Center for Conservation Bioacoustics at Cornell University (USA). He developed the app together with his American colleagues.