The Dinka are a group of tribes of south Sudan, inhabiting the swamplands of the Bahr el Ghazal region of the Nile basin, Jonglei and parts of southern Kordufan and Upper Nile regions. They are mainly agro-pastoral people, relying on cattle herding at riverside camps in the dry season and growing millet (Anyanjang) in fixed settlements during the rainy season. They number around 4.5 million people, constituting about 12% of the population of the entire country, and constitute the largest ethnic tribe in South Sudan.