Mandatory Credit: Photo by Federico Neri/Pacific Press/Shutterstock (11841652ad) the Hadza people sometimes use natural cavities such as small caves or hollows in large baobab trees to make small houses and shelters in which to sleep The Hadza are a Tanzanian ethnic group living around Lake Eyasi. The population reaches almost a thousand people; 300-400 live as hunter-gatherers. The Hadza have no close correlation with any other population. They were considered an East African branch of the Khoisan people, mainly due to the fact that their language has the typical pops of the Khoisan languages, but recent genetic research studies suggest a proximity to the Pygmies. Their language appears to be isolated, unrelated to others. Hadzabe tribe in Lake Eyasi, Tanzania - 15 Oct 2014