The mountain gorilla’s extraordinary population recovery — from fewer than 250 individuals in 1981 to over 1,063 today — is Africa’s most celebrated conservation success story, but the story is more complicated than the headline number suggests. The threats facing mountain gorillas in 2025 are different from those of the 1980s (which were primarily poaching and habitat clearance): today’s primary risks are disease transmission from humans (respiratory viruses, for which gorillas have no natural immunity), the long-term effects of climate change on the Bwindi and Virunga forest ecosystems, the boundary dynamics between the protected forest and the densest rural human population in Africa (the Kigezi highlands surrounding Bwindi have 400+ people per square km), and the political instability of the eastern DRC bordering the Virunga section of the range. Understanding these threats — and the conservation systems managing them — provides important context for the gorilla trekking experience. This guide covers mountain gorilla conservation in depth for 2025.
Disease: The Human Transmission Risk
Respiratory disease transmitted from humans to gorillas is the primary conservation threat to the mountain gorilla population in the habituation era. The mountain gorilla’s immune system has no evolved defence against common human respiratory pathogens (rhinovirus, influenza, respiratory syncytial virus — viruses that cause mild illness in adult humans can cause severe and potentially fatal respiratory disease in gorillas). The Volcanoes Veterinary Center (VVC) in Volcanoes NP Rwanda and the Mountain Gorilla Veterinary Project (MGVP) in Uganda (now operating as Gorilla Doctors) provide the frontline response: monitoring of habituated communities for illness signs, veterinary intervention when gorillas show respiratory distress (sedation and antibiotic treatment in severe cases), and the 7-metre visitor distance rule (enforced at all habituated group encounters). The COVID-19 pandemic (2020–2021) produced the gorilla tourism sector’s most intense disease-risk period — all tourism was suspended from March 2020 to October 2020 to protect the habituated groups from potential SARS-CoV-2 transmission from asymptomatic tourist visitors.
Habitat: The Forest Boundary Challenge
Bwindi Impenetrable Forest is surrounded by one of East Africa’s most densely populated agricultural landscapes — the Kigezi highlands of southwest Uganda support over 400 people/sq km, farming plots extending to the exact boundary of the forest. The pressure points: encroachment (illegal clearing of forest edge for agriculture, particularly in areas where the boundary is not clearly demarcated), illegal resource extraction (firewood, bamboo shoots, and hunting — particularly snare-setting for bush meat that incidentally catches and injures gorillas), and the corridor question (Bwindi is an isolated forest fragment with no wildlife corridor to the Virunga forests 10 km southwest — the mountain gorilla population is isolated from the Virunga population with no genetic exchange pathway). UWA’s buffer zone management programme (the Multiple Use Programme — allowing limited resource extraction in defined buffer zone areas adjacent to the park) is the principal mechanism managing the boundary pressure.
Tourism Revenue and Conservation
The USD $800 gorilla permit revenue flow: of the USD $800 per permit (paid to UWA), 20% (USD $160) goes directly to the communities adjacent to Bwindi through the Uganda Wildlife Authority revenue sharing programme. This USD $160 per trekker funds: school construction and maintenance, health centre support, clean water system installation, and the community game scout programme (former poachers employed as community rangers who patrol the forest boundary for snares and encroachment). The calculation that makes gorilla tourism rational for the communities: a family holding 1 acre of land adjacent to Bwindi earns approximately USD $300–400/year from farming that acre. The annual revenue sharing payment from the gorilla tourism programme to a community of 1,000 families is approximately USD $160 per permit x the number of permits issued for their sector annually — typically USD $150,000–200,000 distributed among the surrounding community. The per-family allocation is smaller than farming income but is in addition to it and comes without agricultural labour cost.
