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Most Tangam are hill tribespeople, with a material culture that is similar to that of most Tani peoples of the Siang River valley.
Needham conducted a tour of the "Abor" (Adi) area in the Siang River Valley (modern-day East Siang District in Arunachal Pradesh state) in 1884, which established British relations with a small segment of the Tani hill tribes.