The district is dominated by Nyishin tribe,the Nyishi tribe is belong to Abu Tani family as per the history of the Nyishi clan. There are many tribes belong to Abu Tani familyin other districts, they are Apatani in Lower Subansiri,Galo in Upper Subansiri, Tagin in Upper Subansiri.
Many years back(Before 1950), the sub-tribe among Nyishi,war against each other for power,property and fame which lead them to darkness and very slow development in the community.
The Nyishi tribe people are master tribe in the district. They have a mother tongue Nyishi which they basically used. Mostly spoken other languages are English,Hindi,Assamese. The Nyishi tribe has no written script.
There is another tribe called Puroik(Sulung), they have been living under help and support of Nyishi tribe. They became slave of the Nyishi tribe. Puroiks are located in nearby villages of Nyapin,Koloriang,Sarli and Damin. They live in isolated places like jungle.
In Nyishi mythology, the Puroiks are the sons of God Wind.
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