The largest primate on Earth is fighting a losing battle against human conflict.

Nature · Published 3 October 2026 Swipe more like this →

In short: The eastern lowland gorilla, or Grauer's gorilla, is the largest living primate, yet its survival is threatened by civil war and illegal resource extraction in the Democratic Republic of the Congo. Despite their peaceful social structure, these great apes face severe population declines driven by poaching and habitat loss.

Endemic to the mountainous forests of the eastern Democratic Republic of the Congo, the eastern lowland gorilla is the largest of the four gorilla subspecies. Males can weigh over 200 kilograms and stand nearly two meters tall. These robust primates live in stable, family-oriented groups, typically led by a dominant silverback who protects the troop from danger. Unlike their mountain gorilla relatives, they inhabit a wide altitudinal range, moving between lowland tropical forests and high-altitude swamps.

The species is currently classified as critically endangered. Population estimates have fluctuated significantly, with counts dropping from nearly 17,000 in the mid-1990s to fewer than 3,800 by 2016, though a 2021 survey suggested numbers might be as high as 6,800. This instability is largely attributed to the ongoing civil war in the region. Militia groups and displaced refugees, driven by hunger and the need for resources, have turned to poaching for bushmeat, which has decimated local populations. Furthermore, the illegal extraction of minerals like coltan, wolframite, and cassiterite—often used by multinational corporations—fuels the conflict and destroys prime gorilla habitat through logging and mining.

Beyond direct violence, the species faces a biological crisis. Recent genetic studies indicate an extreme lack of diversity within the subspecies, likely caused by a limited number of founders and low migration rates. This inbreeding depression, evidenced by birth defects, limits the gorillas' ability to adapt to environmental changes. With the species now occupying only 13% of its historical range, conservationists are struggling to maintain protection in areas where park rangers are frequently targeted by armed groups. The survival of these primates remains precariously linked to the political and economic stability of the Congo.

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