Juvenile mandrills (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Rehabilitated orphaned chimpanzee (Pan troglodytes) released back into natural habitat, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Rehabilitated orphaned chimpanzee (Pan troglodytes) released back into natural habitat, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Rehabilitated orphaned western lowland gorilla (Gorilla gorilla gorilla) released back into natural habitat, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Portrait of a male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Rehabilitated orphaned western lowland gorilla (Gorilla gorilla gorilla) released back into natural habitat, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Male mandrill (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

African forest buffalo (Syncerus caffer nanus) with yellow-billed oxpeckers (Buphagus africanus) clinging to its flanks, Parc de la Lekedi, Haut-Ogooue, Gabon, Africa

Female mandrill suckling offspring (Mandrill sphinx), Parc de la Lekedi, Haut-Ogooue, Gabon, Africa