The Moroccan geographer Mohamed Berriane just told me an amazing story:
About ten years ago, in Corsica, he talked to some Corsicans who had been hiking in the mountains in Morocco. On a high mountain slope, they encountered some bad weather and got lost. So they did what Corsicans do in that situation: they sang a specific song, which is known in Corsica as a call for help. And right away, some local Amazighs heard them and came to help them, because the Amazighs have the same song, which they use in the same way.
Mohamed thought this was fascinating and should be studied, but hasn't found anyone who's interested.
