Robuta

https://www.openculture.com/2018/01/the-whistled-language-of-oaxaca-mexico.html 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... whistled languagespeakingwhistlesoaxacamexico https://www.openculture.com/2013/03/speaking_in_whistles_the_whistled_language_of_oaxaca_mexico.html 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... whistled languagespeakingwhistlesoaxacamexico