The clan separated from other Huaorani in 1968, led by Taga, during a period of intense inter-clan violence and have since lived in comparative isolation. Attempts at contact by outside peoples have often been violently rebuffed, beginning with a series of attacks on the colonial settlement of Coca in reprisal for the attempted evangelization by the Summer Institute of Linguistics. The most recent such violence was the 1987 spearing of missionaries Alejandro Labaca and Inés Arango.
Contact with other Huaorani has remained at a low level, often marked by bursts of inter-clan violence, as in 1993 and 2003.
It is estimated that there are perhaps only 20-30 surviving Tagaeri, although these numbers are uncertain. Together with the Taromenane they make up the two last known indigenous groups living in voluntary isolation in Ecuador. On February 15, 2008, authorities in Ecuador agreed to investigate reports that five tribespeople belonging to the Taromenane and Tagaeri tribes were killed by illegal loggers.