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There's a "Turkish bird-language" that's whistled, and dying out now that cellphones are available. https://en.wikipedia.org/wiki/Turkish_bird_language https://

• shellfishgene 6y ago
  I didn't know there were so many of those! https://en.wikipedia.org/wiki/Whistled_language https://en.wikipedia.org/wiki/Whistled_language
• danirod 6y ago
  The Silbo Gomero [1] in the Canary Islands falls in this category as well. It was designed to allow far distance communication through the valleys and ravines of the islands. Here [2] is an example. There are now efforts to preserve the language, but there is a whole generation unable to speak it because cellphones and lack of farmers made the language almost obsolete. [1] https://en.wikipedia.org/wiki/Silbo_Gomero https://en.wikipedia.org/wiki/Silbo_Gomero [2] https://en.wikipedia.org/wiki/File:Silbo.ogg https://en.wikipedia.org/wiki/File:Silbo.ogg