Wouldn't surprise me in the least. This whistling language puts me in mind of the various African drum languages, of which the West African talking drums are po

Wouldn't surprise me in the least. This whistling language puts me in mind of the various African drum languages, of which the West African talking drums are possibly most well known. They can send complex messages across many miles. https://en.wikipedia.org/wiki/Talking_drum https://en.wikipedia.org/wiki/Talking_drum