Mbeli is the largest of several forest clearings scattered along the tributaries of the Ndoki River, and as such it has long been a prized place for hunting and elephant poaching.
The creation of the National Park put an end to this, and researchers started working at the clearing in 1994. Initially focused on documenting the visiting gorillas, researchers have expanded their scope and now gather a variety of data on elephants, sitatungas and buffalos, leading to studies on a range of different topics, and informing conservation policies.
For these species, every animal visiting the clearing is individually known to the researchers, providing life histories of up to two decades for some. Over time, the research team has identified more than 600 elephants, 500 gorillas and 150 sitatungas. The Mbeli Baï Study is the longest running field site on some of these species.