By Serge K. Soiret, GAP correspondent in West Africa, from Ivory Coast

The Mountain Niénokoué is a 396-meter-massive granite that surrounds the TaiForest in the South-East. This mountain has a panoramic vision of the primary forest inhabited by a large community of chimpanzees and also offers a river view. HanaRiver is located at the natural border near the northern territory, where chimpanzees live and accept human presence.

When we follow them, they show us a lot of behaviours, such as eating leaves. This is a preventive and curative behaviour in order to improve their health, according to studies conducted by a team of researchers – http://en.scientificcommons.org/sabrina_krief

The second behaviour is the building of nests at 5 pm, by the weakest females (such as the oldest and pregnant), and at 6 or 7 pm by the most restless chimpanzees. Branches are broken and used to build the nest in the trees. Each chimpanzee is entitled to a nest for the night. Except the babies, who stay in the same nest with their mothers. For example: for each 5 adults chimpanzees followed, you will have 5 nests built and used once. Chimpanzees never sleep in a nest twice.

Finally, the manipulation of tools by chimpanzees. As we observe, the left hand is frequently used by chimpanzees to have access to the kernel of the nut ⁽¹⁾.

 ⁽¹⁾Cracking Panda nuts with a hammer and an anvil stone. Panda oleosa nut-shaped egg very resistant, it typically contains 3, sometimes 4, almond oil.