Close your eyes and listen: Are these birds or humans?

Check out some of the contestants participating in the songbird calling contest that's part of the annual "Sagra dei Osei Cisano" festival held in Bardolino, Italy. Garda Tourism provides this overview of the festival:

"Festival del Sisán" is the oldest fair of bird hunting sector in Veneto; fairs of this kind were created in the twelfth century in Northern Italy, the places most affected by the migration of birds.