In 1989, wildlife biologist George Schaller estimated the mountain gorilla population at approximately 620 individuals. The species was on a trajectory that conservation scientists were increasingly describing as potentially unsurvivable — too few animals, too much habitat loss, too much human pressure, too little funding for the protection mechanisms that might have made a difference. Thirty-five years later, the mountain gorilla population stands at over 1,100. No other large mammal on earth has achieved a comparable recovery from such a severe population decline. This is how it happened.
The Starting Point
The mountain gorilla’s difficulties in the twentieth century were multiple and compounding. Its range — the Virunga Massif volcanoes straddling Rwanda, Uganda, and DRC, and the Bwindi forest in south-western Uganda — was being compressed from all sides by one of Africa’s most rapidly growing human population. Forest clearance for agriculture and charcoal production shrank the available habitat year by year. Poaching, primarily for the trade in infant gorillas to collectors and zoos, removed individuals and disrupted social groups. Disease, particularly respiratory illness, periodically swept through gorilla communities whose immune systems had no experience of many human pathogens.
By the early 1980s, conservation scientists were describing the mountain gorilla as Africa’s most endangered great ape. The species was listed as critically endangered on the IUCN Red List. There was no consensus on whether the population could be stabilised, let alone recovered.
Dian Fossey and the Research Foundation
Dian Fossey began her study of mountain gorillas in the Virunga Massif in 1967, establishing the Karisoke Research Centre in Rwanda. Over eighteen years, Fossey built an understanding of individual gorilla families, their social structures, and their vulnerabilities that formed the scientific foundation for all subsequent conservation work. Her confrontational approach to poachers — destroying snares, disrupting poaching operations, refusing to compromise — was controversial but effective in the Karisoke area during her lifetime.
After Fossey’s murder in 1985, the Dian Fossey Gorilla Fund International continued the research and anti-poaching work she had established. The organisation remains one of the primary research and conservation operations in the Virunga Massif, with continuous gorilla monitoring stretching back over five decades — the longest continuous wildlife study of a single species in Africa.
Habituation and Tourism as Conservation Mechanisms
The decision to habituate mountain gorillas to human presence and develop regulated gorilla trekking tourism was controversial at the time it was made in the 1980s. Critics argued that bringing tourists into close proximity with an endangered species created disease risk, disturbed natural behaviour, and set a precedent for commercial exploitation of wildlife at the expense of conservation. Proponents argued that the alternative — attempting to protect gorillas through anti-poaching alone, without the economic rationale that tourism provided — was not financially sustainable.
The evidence has settled the argument. The gorilla families that were habituated and became available for trekking are the ones that have been most intensively protected. The income from trekking permits — $800 USD per person for international visitors in 2027 in Uganda — has funded the ranger forces, the veterinary programmes, and the community support initiatives that have made the recovery possible. The gorilla families that remain unhabituated and therefore generate no tourism income have received less protection and have experienced higher rates of human interference.
The Community Dimension
The mountain gorilla’s recovery required not just ranger patrols and veterinary care but the transformation of the relationship between gorilla conservation and the communities living alongside the forest. In both Uganda and Rwanda, revenue-sharing programmes allocated a percentage of park fees to community development — schools, clinics, water infrastructure — giving the families on the park boundary a financial reason to support rather than undermine the park’s integrity.
The results were documented over time in community attitude surveys. In the late 1980s and early 1990s, community attitudes toward Bwindi National Park were predominantly negative. By the late 2000s, in the parishes that received meaningful revenue-sharing benefits, attitudes had shifted to predominantly positive. The communities surrounding Bwindi now include significant numbers of people whose livelihoods depend on the park’s existence — lodge staff, guides, porters, community scouts, craft sellers, and farmers who produce food for lodge kitchens. This economic integration is one of the most powerful protection mechanisms available.
The Numbers Today
The most recent gorilla census, conducted through a combination of direct observation, nest counting, and DNA analysis from hair and dung samples, estimated the total mountain gorilla population at over 1,100 individuals across both the Virunga Massif and the Bwindi ecosystem. The population is growing. The mortality rate has declined. Infant survival has improved as veterinary intervention has become more effective. Range expansion — gorillas moving into areas of their historic range that they had abandoned — has been documented in both Uganda and Rwanda.
What Must Not Change
The mountain gorilla’s recovery is real but fragile. It depends on continuous investment in ranger capacity, veterinary monitoring, habitat protection, and community support. It depends on the political stability in all three range countries that makes conservation operations possible. And it depends on the tourism revenue that finances all of the above.
Every visitor who treks to Bwindi in 2027 and pays the $800 permit is contributing to a conservation success story that was not inevitable and is not self-sustaining. The mountain gorilla comeback is Africa’s greatest conservation story. It is also an ongoing project, with no endpoint, that requires the continued commitment of the people — rangers, researchers, community members, and travellers — who make it possible.
