The bands living a nomadic or seminomadic life in Cuando Cubango Province (and occasionally reaching as far east as the upper Cunene River) differed physically and linguistically from their sedentary Bantu-speaking neighbors. Short, saffron-colored, and in other respects physically unlike the Nganguela, Ovambo, and Nyaneka-Humbe, they spoke a language of the !Xu-Angola or Maligo set of tongues referred to as Khoisan or Click languages (the exclamation point denotes a specific kind of click), whose precise relations to each other are not yet fully understood by observers.