TOPSHOT - Western lowland gorillas are seen at Langoue Bai in the Ivindo national park, on April 26, 2019 near Makokou - Discovered in 2001, Langoue Bai, a marshy clearing set in the forests of Ivindo national park, has since been the focus of long-term elephant and gorilla monitoring. (Photo by Amaury HAUCHARD / AFP)