Most languages spoken by the “small-numbered indigenous peoples of the North” are currently highly endangered or extinct, yet there are big differences in vitality between languages and even dialects. I here discuss the factors that have shaped the current levels of endangerment of three Northern Tungusic lects: the Lamunkhin dialect of Even, the Bystraia dialect of Even, and Negidal. All three communities have lived through the sociopolitical changes associated with the Soviet era, and yet Negidal is nearly extinct, Bystraia Even is spoken only by adults, and Lamunkhin Even is still being passed on to children. The factors favoring language vitality that emerge from this study are the maintenance of cohesive and compact speech communities without forced resettlements and a relative minority of newcomers.