Christophe Courteau / Kalahari bushmen women sitting round fire performing traditional hunting song, viewed from above, Central Kalahari Desert, Botswana, September 2009

Christophe Courteau / Kalahari bushmen performing traditional hunting dance, Central Kalahari Desert, Botswana, September 2009

Christophe Courteau / Kalahari bushmen, family group preparing food in the bush, rainy season, Central Kalahari Desert, Botswana, March 2009

Christophe Courteau / Kalahari bushmen, woman gathering berries and giveing them to her son, rainy season, Central Kalahari Desert, Botswana, March 2009

Christophe Courteau / Kalahari bushmen, family group eating Springhare cooked on the fire in the bush, rainy season, the children eat separately, the adults give them the intestines in order to boost their immune systems a...

Christophe Courteau / Kalahari bushman prepares seeds for cooking in the fire. Central Kalahari Desert, Botswana, March 2009

Jouan & Rius / Bushman San looking into the distance shading face with hand, Kalahari desert, Botswana

Jouan & Rius / Bushman San lying on sand dune with traditional bow, Kalahari desert, Botswana

Jouan & Rius / Bushman San on sand dune with traditional bow, Kalahari desert, Botswana

Jouan & Rius / Bushman San reading animals footprints on sand dune, Kalahari desert, Botswana

Diana Richards Cronk / Cameraman Hugh Maynard buying Ostrich egg from Bushman, Kalahari desert, Botswana, on location for BBC television programme 'The Living Planet - Baking Deserts' 1981

Keith Scholey / Kalahari Bushman tracking. Bushmanland, Namibia, Southern Africa

Keith Scholey / Kalahari Bushman tracking, mother teaches skills to child. Namibia

Keith Scholey / Kalahari Bushman tracking. Bushmanland, Namibia Southern Africa

Keith Scholey / Kalahari Bushmen rest from tracking to dig for roots. Namibia

Pete Oxford / San woman holding child Kalahari desert, South Africa

Pat De La Harpe / San bushmen couple, near Kalahari Gemsbok NP, South Africa

Mark Moffett / Flea Beetle (Diamphidia nigroornata) larvae used to poison arrow by Kalahari or Kung Desert Bushman, Namibia

Mark Moffett / Flea Beetle (Diamphidia nigroornata) larvae used to poison arrows are thought after by Kalahari or Kung Desert Bushman who is digging for them, Namibia

Pete Oxford / Kalahari bushman with scorpion, Makgadikgadi Pans, Kalahari Desert, Botswana

Patricio Robles Gil / San man peering out from shelter, Kalahari Desert, Africa

Diana Richards Cronk / Kalahari bushman setting trap, Kalahari desert, Botswana c1990

Diana Richards Cronk / Kalahari bushman sitting by tuber dug from ground Kalahari desert South Africa

Diana Richards Cronk / Kalahari bushman drinks water from Ostrich egg Botswana

HUGH MAYNARD / Kalahari bushman drinking water from buried Ostrich egg. Botswan

John Downer / San bushman family by huts Kalahari Botswana Southern Africa