[9][7] The distinction between Ngiyampaa, Wangaaypuwan, and Wayilwan traditionally drawn, and sanctioned by the classification of Norman Tindale, may rest upon a flawed assumption of marked "tribal" differences based on Ngiyampaa linguistic discriminations between internal groups or clans whose word for "no" varied.
[4] According to Tindale's estimation, Ngiyampaa tribal lands (ngurrampaa, "country")[c] extended over some 6,600 square miles (17,000 km2) in the territory, much of it peneplain, lying south of the south bank of the Barwon and Darling rivers, from Brewarrina to Dunlop.
Mount Grenfell, some 80 kilometres (50 mi) northwest of Cobar, is an important site for the Ngiyampaa people, who were barred from accessing it until the 1970s.
[12] A geographical distinction regarding the homeland camping world (ngurrampaa) is attested between three groups, all inhabiting areas devoid of permanent watercourses.
These are the In 1914 a regional newspaper stated that there had been a massacre in 1859 of around 300 Ngiyampaa at Hospital Creek, close to Brewarrina.