Tweeting before Twitter
Meandering the mountain roads behind Turkey's Black Sea coast, one comes across isolated villages nestled in the hillsides. Some are inaccessible by car and require a few hours' walk across a valley. Cables stretched across the valleys to exchange goods and messages across a pulley are common site. In this context, the kuşdil (bird language), a language consisting of loud whistles developed among mountain residents to facilitate communication.
In modern times, the kuşdil began to give way to electronic communications. In an effort to preserve the language, locals began to host an annual "Bird Language Festival" in the aptly named village of Kuşköy (Bird Village) in the mountains behind Giresun beginning in 1997. Each year several thousand people converge in mid-July in Kuşköy to celebrate the annual festival.
This year, the festival and the language received added international attention due to the research of a Turkish-German scientist, Onur Göntürkün.
This is from the New Yorker article: