Apparently that sort of whistling is also used for communication, at least if Wikipedia is to be believed [0] (or if I could track down the source, which I don’

Apparently that sort of whistling is also used for communication, at least if Wikipedia is to be believed [0] (or if I could track down the source, which I don’t feel like doing just right now): > Sochiapam Chinantec has three different words for whistle-speech: sie³ for whistling with the tongue against the alveolar ridge, jui̵³² for bilabial whistling, and juo² for finger-in-the-mouth whistling. These are used for communication over varying distances. [0] https://en.wikipedia.org/w/index.php?title=Whistled_language&oldid=1035732130 https://en.wikipedia.org/w/index.php?title=Whistled_language...