La Vallée des Singes, located in Romagne, France, introduced its first Western lowland gorillas on May 27, 1998. The silverback Yaoundé, born in 1983 at Wassenaar Zoo in the Netherlands, arrived that year to lead a group of three females.

The gorilla habitat spans approximately 3,800 square meters outdoors and includes a 125-square-meter indoor area. This naturalistic enclosure is shared with red-tailed monkeys and guerezas, providing a dynamic environment for the gorillas.

La Vallée des Singes participates in the European Endangered Species Programme (EEP) for gorillas, contributing to conservation efforts through successful breeding. Notably, the park celebrated the birth of Badongo on September 27, 1999, marking its first gorilla birth.

As one of the few French zoos housing gorillas, La Vallée des Singes plays a significant role in the conservation and public education of this endangered species.