31 Mountain Gorilla Facts To Know Before You Go Gorilla Tracking

Mountain gorillas are among the most extraordinary animals in Africa — gentle giants that share more than 98% of their DNA with humans, yet can only be found in the wild, scattered across a handful of misty mountain forests. There are no mountain gorillas in captivity anywhere in the world, which means the only way to look one in the eye is to travel to Uganda, Rwanda, or the Democratic Republic of Congo. Here's what makes them so remarkable, and what to know before you go gorilla trekking.

Meet the Mountain Gorilla

The mountain gorilla (Gorilla beringei beringei) is one of two subspecies of eastern gorilla, distinguished from its lowland cousins by its thicker fur, stockier build, and shorter arms — all adaptations to the cold, high-altitude forests it calls home. Mountain gorillas live at elevations of roughly 2,200 to 4,300 metres, and share around 98.4% of their DNA with humans. Like humans, each individual gorilla has unique fingerprints and its own distinct nose print, a pattern researchers and rangers use to identify and track specific gorillas over decades.

Despite their intimidating size and reputation on film, mountain gorillas are calm, family-oriented animals. Charging and chest-beating are warnings, not first resorts — a gorilla will almost always try to communicate its displeasure long before it ever considers an attack.

Life in the Troop

Mountain gorillas live in tight-knit family groups led by a dominant silverback — a mature male, generally over 12 years old, named for the patch of silver hair that spreads across his back as he ages. The silverback decides where the group feeds, when it rests, and where it beds down for the night, and he will defend his family against rival gorillas, leopards, or humans, if it comes to it. Younger males, known as blackbacks, are gorillas between roughly 8 and 12 years old still waiting their turn to lead a troop of their own; in fact, up to 40% of groups include more than one silverback, usually a father and son or a pair of brothers who share protection duties, even though only the dominant male sires most of the group's offspring.

Female mountain gorillas typically leave their birth family once they reach maturity around age 9, moving on to join another troop or a lone silverback — a natural strategy that keeps the gene pool diverse. When a baby is born, after a pregnancy of about nine months, it weighs only around 1.8 kilograms (four pounds), and it will stay close to its mother for years, much like a human child.

Diet, Days, and Forest Nests

A mountain gorilla's diet is almost entirely vegetarian: leaves, stems, bark, and roots, with the occasional ant or grub for protein. A large silverback can eat up to 18 kilograms (40 pounds) of vegetation a day, mostly during two main feeding periods in the morning and evening, with a long rest in the middle of the day when adults nap and youngsters play. Rather than living in trees, gorillas spend most of their time on the ground — they are simply too heavy for branches to support for long — and use their signature knuckle-walking gait, aided by arms longer than their legs, to move easily across the forest floor. Every night, the troop builds an entirely new nest from bent branches and leaves, since gorilla families rarely sleep in the same spot two nights running.

From Critically Endangered to a Conservation Success Story

Mountain gorillas have one of the most hopeful stories in modern conservation. In 1981, fewer than 254 individuals were thought to survive in the wild. Decades of habitat protection, anti-poaching patrols, and community-based tourism — much of it built on the pioneering fieldwork of researchers like Dian Fossey — helped the population climb steadily, and in 2018 the IUCN officially reclassified mountain gorillas from Critically Endangered to Endangered, one of vanishingly few great ape success stories. The most recent transboundary census counted just over 1,000 individuals living in the wild, roughly split between the Virunga Massif and Bwindi Impenetrable Forest.

The gains are real, but fragile: mountain gorillas have almost no natural predators (a leopard might take a lone youngster, but no animal can challenge an entire family), so habitat loss and human encroachment remain by far their greatest threat. Because gorillas share so much of our biology, they're also susceptible to human respiratory illnesses, which is why trekkers who are unwell are asked to postpone their visit.

Where to See Mountain Gorillas

Every wild mountain gorilla left on Earth lives in one of two forest ecosystems. The first is the Virunga Massif, a chain of volcanoes straddling the borders of Rwanda, Uganda, and the Democratic Republic of Congo. The second is Bwindi Impenetrable Forest and neighbouring Mgahinga Gorilla National Park, both in Uganda. Congo is home to the fewest gorilla families of the three range countries, largely due to decades of regional instability, while Rwanda's Volcanoes National Park and Uganda's Bwindi have become the two most established and accessible gorilla trekking destinations in Africa. There's nowhere else to see a mountain gorilla — the subspecies has never survived in captivity, so a zoo visit simply isn't an option.

Planning Your Gorilla Trek

Gorilla trekking means hiking through steep, forested terrain with an experienced guide and a team of trackers who follow a habituated family to its overnight nesting site, before granting visitors a closely regulated hour in the gorillas' company. Permits are limited and must be booked well in advance: Uganda's cost around $800 per person, while Rwanda's are priced at roughly $1,500, as part of a deliberate high-value, low-impact tourism strategy. Some parks also offer longer gorilla habituation experiences, allowing visitors to spend a full day observing researchers and rangers as they work to habituate a new family to human presence.

Trekking is possible year-round, though most visitors choose the drier months from June to September or December to February, when forest trails are easier underfoot. Wherever you choose to trek, pairing your gorilla encounter with a wider itinerary is easy — an itinerary like Revel in Rwanda combines gorilla trekking with the country's volcanoes, lakes, and vibrant culture for a fuller picture of the region.