Mountain Gorilla Range — Divided Between Three Countries, Managed Across Borders
The mountain gorilla’s entire wild range — the only place on earth where mountain gorillas live — is concentrated in a highland forest system that straddles the borders of three Central African countries: Rwanda, Uganda, and the Democratic Republic of Congo. This tri-national geography is not an administrative convenience but the direct consequence of the forest system’s location in the Albertine Rift, where the borders of the three countries converge at the junction of the Virunga Massif and the Bwindi Impenetrable Forest. Understanding how the gorilla population is distributed across this geography — and what tri-national management means in practice for conservation — is fundamental to understanding why mountain gorilla conservation requires a level of cross-border coordination that most single-country conservation programmes do not.
The Virunga Population — Three Countries, One Family of Gorillas
The Virunga population of mountain gorillas lives in the Virunga Massif — a chain of eight extinct and active volcanoes that straddles the borders of Rwanda, Uganda, and DRC in a roughly east-west alignment. The Rwandan sector (Volcanoes National Park, formerly Parc National des Volcans) protects the most visited portion of the Virunga; the Ugandan sector (Mgahinga Gorilla National Park, the smallest national park in Uganda) protects the easternmost Virunga slopes; and the DRC sector (Virunga National Park, Africa’s oldest national park, established 1925) protects the largest proportion of the Virunga mountain gorilla range. The approximately 604 Virunga gorillas move across these three national park boundaries in their daily and seasonal ranging — the gorilla families do not recognise national borders, and some families regularly range across two or three national territories in their home range use.
The Bwindi Population — Uganda Only
The Bwindi population of mountain gorillas (approximately 459 individuals) lives entirely within Uganda’s Bwindi Impenetrable National Park and the small adjacent Sarambwe Nature Reserve in DRC (which contains a few gorillas in forest connecting to Bwindi). Unlike the Virunga population, whose range spans three countries, the Bwindi population is essentially a single-country management responsibility under Uganda Wildlife Authority — with the small Sarambwe component adding a minor DRC dimension. The Bwindi and Virunga populations are separated by approximately 25 kilometres of unprotected land, and the two populations are genetically distinguishable — managed as separate conservation units with separate goals.
The International Gorilla Conservation Programme
The International Gorilla Conservation Programme (IGCP), a partnership between WWF, Fauna & Flora International, and African Wildlife Foundation, coordinates cross-border gorilla conservation across the Rwanda-Uganda-DRC tri-national landscape. The IGCP’s coordination role includes: joint ranger training across the three national agencies, cross-border patrol coordination in the overlap zones where gorilla families range across national boundaries, and the shared scientific database that allows monitoring teams in all three countries to track the same family groups as they move across the international borders. The tri-national cooperation that IGCP facilitates is operationally complex — three national governments with different political contexts, management philosophies, and resource levels — but it is essential for the coherent management of a gorilla population that does not respect the administrative boundaries those governments have drawn.
