Dinka, also called Jieng, people who live in the savanna country surrounding the central swamps of the Nile basin primarily in South Sudan. They speak a Nilotic language classified within the Eastern Sudanic branch of the Nilo-Saharan languages and are closely related to the Nuer. Numbering some 4,500,000 in the early 21st century, the Dinka form many independent groups of 1,000 to 30,000 persons. Those groups are organized on a regional, linguistic, and cultural basis into clusters, of which the best-known are the Agar, Aliab, Bor, Rek, Twic (Tuic, Twi), and Malual. The Dinka are primarily transhumant pastoralists, moving their herds of cattle to riverine pastures during the dry season (December to April) and back to permanent settlements in savanna forest during the rains, when their food crops, principally millet, are grown. Each group is internally segmented into smaller political units with a high degree of autonomy.

https://www.youtube.com/watch?v=K4HETY_U5Q0

People from this tribe are very tall

Yes they are..