The village of Bossou (7 39' N and 8 30' W) is situated in southeastern Guinea, West Africa. Currently, a small population of 12 chimpanzees (P. t. verus) inhabit the forest surrounding the village(Jan. 2002). Bossou is situated about 6 km from the foot of the Nimba Mountains on the border with the Côte d'Ivoire and Liberia. The village of Bossou is located at 550 m above sea level. It is surrounded by small hills 70-150 m high that are covered in primary and secondary forests. At the foot of those hills, cultivated or abandoned fields and secondary, riverine and scrub forests form a patchy mosaic for about 6km in all directions. This habitat constitutes the core area of the Bossou community.