The difference between mountain gorillas and lowland gorillas can be seen in their habitat, physical characteristics, diet, behavior, geographical distribution, and conservation status.
Although both belong to the great ape family and share approximately 98% of their DNA with humans, they have developed distinct adaptations to the environments in which they live.
Mountain gorillas are famous for their thick fur, large bodies, and high-altitude habitats in the forests of Uganda, Rwanda, and the Democratic Republic of Congo (DRC).
Lowland gorillas, on the other hand, inhabit tropical forests and swampy lowland regions of Central Africa. They include western lowland gorillas and eastern lowland gorillas, also known as Grauer’s gorillas.
Both mountain gorillas and lowland gorillas are intelligent, social, and generally peaceful primates. Despite their impressive strength, they do not usually display aggression unless they feel threatened or are protecting members of their group.
Understanding the differences between mountain gorillas and lowland gorillas is particularly useful for travelers planning a gorilla trekking safari in Africa, wildlife enthusiasts, and anyone interested in great ape conservation.
Comparing Mountain Gorillas and Lowland Gorillas
The following table highlights the main differences between mountain gorillas and lowland gorillas.
| Feature | Mountain Gorillas | Lowland Gorillas |
|---|---|---|
| Scientific classification | Eastern gorilla (Gorilla beringei beringei) | Western lowland (Gorilla gorilla gorilla) or eastern lowland/Grauer’s (Gorilla beringei graueri) |
| Main habitat | High-altitude montane forests and bamboo forests | Tropical rainforests, lowland forests, and some swamp forests |
| Geographic distribution | Uganda, Rwanda, and the DRC | Western lowland gorillas occur across parts of Central and West-Central Africa; eastern lowland gorillas occur in eastern DRC. |
| Body size | Large, heavily built, with broad chests and shoulders | Generally smaller in the western lowland subspecies; eastern lowland gorillas are also large-bodied |
| Fur | Thick, long, dark fur | Generally shorter, thinner, and sometimes brownish-black fur in western lowland gorillas |
| Diet | Mainly leaves, stems, shoots, pith, and other vegetation | Leaves, stems, shoots, fruit, and other plant material; some insects are also eaten |
| Social structure | Groups commonly led by a dominant silverback | Social groups also commonly led by a dominant silverback |
| Movement | Primarily terrestrial, moving through mountainous forest terrain | Primarily terrestrial, with more tree climbing and movement through forest habitats, especially among younger gorillas |
| Conservation status | Endangered | Western and eastern lowland gorillas are critically endangered |
| Trekking opportunities | Established gorilla trekking in Uganda, Rwanda, and parts of the DRC when open | Limited, specialized opportunities in certain protected areas, depending on access and conservation programs |
The comparison is between mountain gorillas and the two lowland forms collectively. Their characteristics vary between subspecies, so not every feature applies equally to all lowland gorillas.
1. Habitat of Mountain Gorillas and Lowland Gorillas
One of the most important differences between mountain gorillas and lowland gorillas is the environment in which they live. Their fur, feeding habits, and daily movements are closely associated with the forests they inhabit.
Mountain Gorilla Habitat
Mountain gorillas live in high-altitude forests characterized by cool temperatures, frequent mist, steep slopes, and dense vegetation. Their habitats include the Virunga volcanic mountain range and the Bwindi Impenetrable Forest region.
Mountain gorillas are found in three countries:
- Uganda: Bwindi Impenetrable National Park and Mgahinga Gorilla National Park.
- Rwanda: Volcanoes National Park.
- Democratic Republic of Congo: Virunga National Park, subject to current park access and security conditions.
Their thick, long fur helps them withstand the cold conditions of mountainous forests. They spend much of their time on the ground, feeding on vegetation and moving through dense undergrowth.
Although mountain gorillas can climb trees, their substantial body weight means that they generally prefer the ground or sturdy branches when climbing.
Lowland Gorilla Habitat
Lowland gorillas live primarily in tropical forests at lower elevations. Their habitats include humid rainforests, dense woodland, and areas with abundant fruit and other vegetation.
Western lowland gorillas occur across parts of Cameroon, the Central African Republic, Equatorial Guinea, Gabon, the Republic of the Congo, and parts of the wider Congo Basin. Their present distribution in the Democratic Republic of Congo is limited and requires careful distinction from their historical range.
Eastern lowland gorillas, also called Grauer’s gorillas, are found in the eastern Democratic Republic of Congo.
Compared with mountain gorillas, western lowland gorillas generally have shorter and thinner fur, which is suited to their warmer forest environments. They also consume considerable amounts of fruit when it is seasonally available.
Both mountain and lowland gorillas depend on healthy forest ecosystems for food, shelter, breeding, and protection. Habitat destruction, disease, poaching, and human encroachment remain significant threats to their survival.
2. Behavioral Differences Between Mountain Gorillas and Lowland Gorillas
Mountain gorillas and lowland gorillas are social animals that live in family groups, often called troops. These groups usually consist of a dominant silverback, several adult females, juveniles, and infants, although group composition varies.
Mountain Gorilla Behavior
Mountain gorillas are generally calm, intelligent, and social. Group members communicate through vocalizations, facial expressions, body postures, grooming, and physical contact.
A dominant silverback usually leads the group, makes important decisions about movement, and helps protect members from potential threats. Females form social relationships with other group members, while young gorillas spend much of their time playing and learning.
Mountain gorilla groups often contain several individuals and may vary considerably in size. Their daily activities revolve around feeding, resting, moving through the forest, and caring for their young.
When threatened, a silverback may display defensive behavior, including chest beating, vocalizing, standing upright, or making a charge. These displays are often intended to intimidate rather than cause physical injury.
Lowland Gorilla Behavior
Lowland gorillas also have complex social lives. Western lowland gorillas typically live in groups led by a dominant silverback, with females and their offspring. Some individuals may live in smaller groups or display different social arrangements.
They communicate through sounds, gestures, facial expressions, scent signals, and body language. Their vocalizations can include grunts, barks, hoots, and screams.
Western lowland gorillas are known for consuming fruit when it is available. Seasonal changes in food distribution can influence how far they travel and where they forage.
It is inaccurate to describe lowland gorillas as consistently peaceful while mountain gorillas are more aggressive, or to claim that one is inherently more sociable than the other. Both are generally nonaggressive when undisturbed, but their behavior depends on individual temperament, group dynamics, and circumstances.
3. Physical Characteristics of Mountain Gorillas and Lowland Gorillas
Mountain gorillas and lowland gorillas share many physical features, including muscular bodies, powerful arms, broad chests, and dark fur. However, differences in their size, coat, and facial features can help distinguish them.
Mountain Gorilla Physical Characteristics
Mountain gorillas are among the largest and heaviest living primates. Adult males can weigh several hundred pounds, with particularly large individuals exceeding 400 pounds. When standing upright, a mature male may reach approximately 5 to 6 feet in height.
They have thick, long, dark fur that provides insulation against the cold and damp conditions of their high-altitude habitats. Their bodies are heavily built, with broad shoulders, powerful arms, and strong hands adapted for knuckle-walking and handling vegetation.
Mature males develop silver or grey hair across their backs, which gives them the name silverbacks. This change generally accompanies sexual maturity and is not exclusive to mountain gorillas.
Lowland Gorilla Physical Characteristics
Western lowland gorillas are generally the smallest of the four recognized gorilla subspecies. Adult males commonly weigh around 300 pounds, although individuals can be substantially heavier and may reach approximately 6 feet when standing upright.
They typically have shorter, thinner fur than mountain gorillas. Their hair may appear black, brownish-black, or grey-black, depending on the individual and lighting conditions. Western lowland gorillas also tend to have a more pronounced brow ridge and a broader skull.
Eastern lowland gorillas are larger than western lowland gorillas in many cases, so it is misleading to assume that every lowland gorilla is smaller than every mountain gorilla.
Both mountain and lowland gorillas develop silver hair across the back as mature males. The amount and distribution of silvering can vary with age and subspecies.
4. Feeding Habits of Mountain Gorillas and Lowland Gorillas
Mountain gorillas and lowland gorillas are primarily herbivorous. Their diets consist mainly of plant material, although the types and proportions of food they consume differ according to habitat and seasonal availability.
What Do Mountain Gorillas Eat?
Mountain gorillas feed largely on leaves, stems, shoots, pith, bark, and other vegetation. Their forest habitats provide a wide range of plant species throughout the year.
Because fruit is less abundant in many mountain gorilla habitats, their diet often contains a higher proportion of leafy vegetation than that of western lowland gorillas.
Mountain gorillas spend a substantial part of each day feeding and moving between patches of vegetation. Their large bodies require considerable quantities of food to maintain their energy levels.
What Do Lowland Gorillas Eat?
Western lowland gorillas consume a varied diet that includes fruit, leaves, stems, seeds, shoots, and other plant material. Fruit can form a substantial part of their diet when it is available.
They may also consume small invertebrates, including ants and termites, incidentally or as a supplementary food source. However, they should not be described as regular predators of small reptiles; plant material makes up the main part of their diet.
Eastern lowland gorillas also feed on a variety of vegetation, including leaves, stems, and other forest plants. Their diets reflect the resources available in their particular habitats.
The main dietary difference is that western lowland gorillas often eat more fruit, while mountain gorillas typically rely more heavily on leaves and other fibrous vegetation.
5. Population and Conservation Status of Mountain Gorillas and Lowland Gorillas
Population size and conservation status are important considerations when comparing mountain gorillas and lowland gorillas.
Although western lowland gorillas have a much larger estimated population than mountain gorillas, their numbers have declined substantially because of disease, hunting, habitat destruction, and other human pressures.
Mountain Gorilla Population
Mountain gorillas have a relatively restricted geographical distribution, occurring in the Virunga Massif and Bwindi-Sarambwe landscape.
Their numbers have increased following decades of conservation work, including anti-poaching patrols, habitat protection, veterinary interventions, and responsible gorilla tourism. However, their limited range makes them vulnerable to habitat disturbance, disease transmission, and other threats.
Mountain gorillas are classified as Endangered on the IUCN Red List.
Lowland Gorilla Population
Lowland gorillas are divided into two distinct subspecies with different ranges and population estimates.
Western lowland gorillas are the most numerous gorilla subspecies. A widely cited 2018 survey estimated approximately 361,900 individuals, but that figure should not be interpreted as a current population count. Despite their greater numbers, western lowland gorillas are classified as Critically Endangered because of continuing population declines and substantial threats.
Eastern lowland gorillas are also classified as Critically Endangered. Their population is much smaller and concentrated in eastern Democratic Republic of Congo, where habitat loss, hunting, insecurity, and other pressures threaten their survival.
Consequently, the statement that lowland gorillas are less endangered simply because they are more numerous would be incorrect. Conservation status reflects population trends, threats, distribution, and the risk of extinction, not population size alone.
6. Communication Between Mountain Gorillas and Lowland Gorillas
Mountain gorillas and lowland gorillas communicate using a combination of vocalizations, gestures, facial expressions, body postures, and scent signals.
Mountain gorillas may grunt, bark, hoot, or make other sounds to communicate with group members. Chest beating, body positioning, and facial expressions can convey information about social status, excitement, or potential threats.
Gorillas can also release odors through specialized scent glands and other bodily signals. These odors may provide information about an individual’s presence or emotional and reproductive state. However, it is not accurate to claim that mountain gorillas uniquely release a strong odor from their armpits whenever they are unhappy, or that lowland gorillas lack similar scent-based communication.
Lowland gorillas also use vocalizations and body language to maintain social relationships, coordinate group movements, and respond to possible danger.
Both types of gorilla have sophisticated communication systems that help them navigate complex social environments.
7. Speed and Movement: Mountain Gorillas vs. Lowland Gorillas
Mountain gorillas move through steep slopes, dense vegetation, and uneven terrain. Their powerful limbs help them navigate these challenging environments, but there is insufficient evidence to conclude that they are inherently faster than lowland gorillas.
Lowland gorillas also possess strong arms and legs that allow them to move through forest floors and, when appropriate, climb trees. Young gorillas are especially likely to climb, play, and move through branches.
Adult gorillas of both types spend much of their time on the ground and usually travel on all fours using knuckle-walking. Both can move quickly when alarmed, threatened, or motivated to escape danger.
Their movement patterns are influenced by terrain, food availability, group behavior, and individual circumstances rather than a simple difference in speed.
8. Intelligence of Mountain Gorillas and Lowland Gorillas
Mountain gorillas and lowland gorillas are both highly intelligent great apes. They demonstrate problem-solving abilities, social learning, memory, communication, and the capacity to develop complex relationships.
Mountain gorillas learn from other members of their groups, particularly during infancy and adolescence. Young gorillas develop essential social skills through play, observation, and interactions with older individuals.
Lowland gorillas also display flexible behavior and can adapt their foraging strategies to changing food availability. Western lowland gorillas, in particular, may travel between fruiting trees as seasonal resources change.
There is no reliable basis for claiming that mountain gorillas are more intelligent than lowland gorillas because they live in more challenging environments. Both have evolved behaviors suited to their ecological conditions, and their intelligence cannot be ranked accurately using habitat alone.
9. Gorilla Trekking: Where Can You See Mountain and Lowland Gorillas?
One of the most important practical differences between mountain gorillas and lowland gorillas is the availability of gorilla trekking experiences.
Mountain gorilla trekking is an established wildlife tourism activity in Uganda and Rwanda, with additional opportunities in the Democratic Republic of Congo when park access and security conditions permit.
Mountain Gorilla Trekking in Uganda
Uganda offers mountain gorilla trekking in two protected areas:
- Bwindi Impenetrable National Park: Known for its dense rainforest, steep terrain, and multiple gorilla trekking sectors.
- Mgahinga Gorilla National Park: Part of the Virunga mountain ecosystem and home to habituated mountain gorilla groups.
Visitors normally need a valid gorilla trekking permit and must follow park regulations. Trek duration depends on the location of the gorilla family, forest conditions, and the pace of the group.
For travelers comparing gorilla trekking destinations, Uganda offers opportunities to combine gorilla encounters with other wildlife and cultural experiences.
Read more about which country between Rwanda and Uganda is best for gorilla trekking.
Mountain Gorilla Trekking in Rwanda
Rwanda’s Volcanoes National Park is another major destination for mountain gorilla trekking. Its location in the Virunga volcanic region provides visitors with opportunities to observe habituated gorilla families in a mountainous forest environment.
Rwanda is often considered by travelers looking for a relatively short gorilla trekking itinerary from Kigali, although the overall cost depends on permits, accommodation, transportation, and other safari arrangements.
Lowland Gorilla Trekking
Lowland gorilla tourism is more specialized and less widely available than mountain gorilla trekking. Certain protected areas in Central Africa offer opportunities to observe western lowland gorillas through regulated tourism or habituation programs, subject to current access arrangements.
Eastern lowland gorillas occur in eastern Democratic Republic of Congo, but tourism opportunities depend on protected-area management, security, and conservation conditions.
Travelers should confirm current availability, permit requirements, and travel advisories before arranging a lowland gorilla experience. The countries where gorillas naturally occur do not necessarily offer regular or safe gorilla trekking for international visitors.
10. How Much Does Mountain Gorilla Trekking Cost?
The cost of gorilla trekking depends on the destination, visitor category, permit type, accommodation, transportation, and duration of the safari.
In Uganda, the standard gorilla trekking permit has commonly been listed at US$800 for foreign non-residents, US$700 for foreign residents, and UGX 300,000 for East African citizens under the relevant tariff. Rates and special offers can change, so confirm the current official Uganda Wildlife Authority tariff before booking.
Rwanda’s standard mountain gorilla trekking permit has commonly been priced at US$1,500 for international visitors, although applicable rates and eligibility conditions should also be confirmed with the Rwanda Development Board.
These permit prices are not the total cost of a gorilla trekking safari. Travelers should also budget for accommodation, transport, meals, guides where applicable, and other activities.
Lowland gorilla experiences have different costs and availability depending on the protected area and the operator. They should not be assumed to have the same permit prices as mountain gorilla trekking.
11. Best Time to Trek Mountain Gorillas and Lowland Gorillas
Mountain gorilla trekking in Uganda and Rwanda is possible throughout the year, subject to permit availability and park access.
The relatively drier periods are often preferred because trails can be less muddy, forest conditions may be easier for hiking, and travel between destinations can be more convenient. In Uganda and Rwanda, these periods generally fall around June to September and December to February, although rainfall patterns vary.
Gorilla trekking remains possible during wetter months, but visitors should prepare for slippery trails, rain, and changing conditions. The gorillas do not disappear during the rainy season, and sightings are not guaranteed to be easier in dry weather.
Lowland gorilla viewing follows the climate and access conditions of the particular Central African destination. Because tourism infrastructure and seasonal conditions differ, travelers should seek destination-specific advice before choosing dates.
When planning a gorilla safari, the best time depends on your preferred travel conditions, budget, permit availability, and the type of experience you want.
12. Conservation of Mountain Gorillas and Lowland Gorillas
Mountain gorillas and lowland gorillas face different ecological and conservation challenges, but both depend on long-term protection of their natural habitats.
Mountain gorilla conservation benefits from coordinated efforts involving governments, wildlife authorities, researchers, conservation organizations, local communities, and responsible tourism operators. Revenue from gorilla tourism can contribute to protected-area management and community development when managed effectively.
Lowland gorillas face extensive threats from forest clearance, commercial hunting, disease outbreaks, mining, logging, and human encroachment. Many western lowland gorillas live outside strictly protected areas, making conservation across wider forest landscapes particularly important.
Responsible wildlife tourism, law enforcement, veterinary monitoring, habitat restoration, and community participation all contribute to gorilla conservation.
Visitors can support these efforts by following trekking guidelines, maintaining the required distance from gorillas, avoiding visits when ill, respecting park rules, and choosing responsible tourism providers.
Conclusion: What Is the Main Difference Between Mountain Gorillas and Lowland Gorillas?
The main difference between mountain gorillas and lowland gorillas lies in their habitat, physical adaptations, diet, geographical distribution, and conservation circumstances.
Mountain gorillas inhabit high-altitude forests in Uganda, Rwanda, and the Democratic Republic of Congo. They have thick fur that helps them tolerate colder conditions and feed primarily on leaves, stems, shoots, and other vegetation.
Lowland gorillas inhabit tropical forests and other lowland habitats. Western lowland gorillas generally have shorter fur and consume more fruit when it is available, while eastern lowland gorillas occupy forests in eastern Democratic Republic of Congo.
Both are intelligent, social great apes that live in groups and are generally peaceful when undisturbed. Mountain gorillas are classified as Endangered, while both western and eastern lowland gorillas are Critically Endangered.
For travelers interested in seeing gorillas in their natural habitat, mountain gorilla trekking in Uganda and Rwanda offers established opportunities, while lowland gorilla experiences require more specialized planning.
A well-planned gorilla safari provides an opportunity to learn about these remarkable primates while contributing to the conservation of some of Africa’s most important forest ecosystems.
