This nature reserve is the natural habitat of Eulemur macaco, endemic lemur of Lokobé. In this primary forest, lemurs play a very important part in the dissemination of seeds, thus promoting the natural regeneration of the forest. 17 birds have been inventoried, including the Malagasy kingfisher, Ipsidina madagascariensis, which is a strictly forest species, and the Madagascar owl, Asio madagascariensis, which are the most remarkable species.