Habituation of the East group started in 2000. Since 2005 the group is fully habituated and chimpanzees can be followed without visually loosing them.
East group has become very important as a comparative group to South group. Most recent studies compare to certain extend the behaviour of two or more groups - Est group being all the time one of them.
Est group became most famous due to the old patriarch Freddy, who regularly adopts orphans. One of these adoptions features in the Disney Nature Movie 'Chimpanzee', which was filmed in Taï with the East group.
Some of the knowledge on the behaviour of Taï chimpanzees that derives from observations on the East group chimpanzees:
- Adoptions (Boesch et al. 2010)
- Coordinating male ranging (Eckhardt et al. 2015)
- Intergroup encounters (Boesch et al. 2008)
In 2005 the community consisted of about 60 individuals. By now (2015) only 33 remain.
Group composition (2015): 5 adult males, 11 adult females, 17 juvenile and infants