Hi there,
On the map from this link
http://slinging.org/forum/YaBB.pl?num=1496268907 we can see a point all the way down in the island of Madagascar.
Last summer I was there on holidays and I (of course) brought a sling with me. I slung three or four times (until a sharp stone cut my release cord and the sling went flying to the centre of a sacred lake. I see it as an offering to the local spirits
) and every time I did it people approached me saying “pilotra” (one of the words for sling in Malagasy) and talk to me about a tribe in the southern part of the island which are very renowned for their slinging.
Well, I would say that everybody in Madagascar knows about slings and, for example, a guy around forty told me that when he was young they use to sling to birds in the countryside. He slung with me for a bit.
So, just a bit of first-hand experience from a place not very well known. Hope you’ll find it of some interest. Unfortunately, I couldn’t visit the tribe in the south.