Whistled language is a rare form of communication that can be mostly found in locations with isolating features such as scattered settlements or mountainous terrain. This documentary above shows how Dr. Mark Sicoli, Assistant Professor of Linguistics at Georgetown University, conducts field studies among speakers of a Chinantec language, who live in the mountainous region of northern Oaxaca in Mexico. The Summer Institute of Linguistics in Mexico has recorded and transcribed a whistled conversation in Sochiapam Chinantec between two men in different fields. The result can be seen and heard here.
The most thoroughly-researched whistled language however is Silbo Gomero, the language of the island of La Gomera (Canary Islands). In 2009, it was inscribed on the Representative List of the Intangible Cultural Heritage of Humanity. The UNESCO website has a good description of this whistled language with photos and a video. Having almost died out, the language is now taught once more in schools.
By profession, Matthias Rascher teaches English and History at a High School in northern Bavaria, Germany. In his free time he scours the web for good links and posts the best finds on Twitter.