Speaking in Whistles: The Whistled Language of Oaxaca, Mexico

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 aChinantec 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.

http://www.openculture.com/2013/03/speaking_in_whistles_the_whistled_language_of_oaxaca_mexico.html