The end of the day, when the cattle have been rounded up and brought back to the safety of the camp, is the busiest time for the Dinka people of southern Sudan.
A black-and-white photograph of just such a scene by the Brazilian photojournalist Sebastiao Salgado is among a series of images to be auctioned in London by Bonhams on 16 November.
The image, titled Dinka Cattle Camp of Amak, is estimated to fetch £4,000 to £6,000 and was taken in 2006. Salgado was appointed a Unicef special representative for his work in recording the lives of dispossessed peoples around the world.
His studies of the Dinka culture reflects the relationship they have with cattle, which they keep for milk, butter, ghee and other products including dung and urine, only slaughtering the animals for meat to mourn the death of tribespeople. Cattle skins are put to a variety of uses such as mats, ropes and ropes. The Dinka live in southern Sudan and extend into south-west Ethiopia.Reuse content