Silverback Gorilla vs Grizzly Bear: Who Would Win?

Q: Conservation: Which Animal Is More Endangered?

Gorillas are far more threatened than grizzly bears. Gorillas:Mountain gorillas are Endangered, with only about 1,063 left in the wild according to the last full census. Western gorillas and Grauer’s gorillas are Critically Endangered. The main threats are poaching, snares, habitat loss and human disease. Grizzly bears:Brown bears as a species are listed as Least Concern worldwide, with healthy populations in Alaska and Canada. Grizzlies are listed as Threatened in the lower 48 US states, where habitat loss and conflict with people remain problems. Mountain gorilla numbers are slowly rising thanks to protected parks, ranger patrols and gorilla tourism, which funds conservation. Read about Uganda Wildlife Authority’s fight against poaching and our endangered animals list.

Silverback Gorilla vs Grizzly Bear: In a fight between a silverback gorilla and a grizzly bear, the grizzly bear would almost certainly win. An adult male grizzly is often twice as heavy as a silverback, at up to 360 kg (790 lb) against about 200 kg (440 lb).

It has 10 cm (4 in) claws and a bone-crushing bite, and it is a predator used to fighting and killing large animals. A silverback is enormously strong, but he is a peaceful plant-eater whose fights are mostly displays and bluff charges.

In reality the two animals will never meet. Silverback gorillas live in the rainforests of central and East Africa, while grizzly bears live in North America.

This guide compares their size, strength, speed, weapons, intelligence and behaviour side by side. It also explains where you can see a real silverback in the wild, in Uganda’s Bwindi Impenetrable National Park.

Silverback Gorilla vs Grizzly Bear: Quick Comparison

Feature	Silverback gorilla	Grizzly bear
Weight	140–200 kg (300–440 lb)	180–360 kg (400–790 lb); some exceed 450 kg
Height	About 1.7 m (5.5 ft) standing upright	About 1 m (3.3 ft) at the shoulder; over 2 m (7 ft) on hind legs
Top speed	About 32–40 km/h (20–25 mph) in short bursts	About 56 km/h (35 mph)
Weapons	Long canine teeth, huge arm strength	Claws up to 10 cm (4 in), bite force about 1,000+ PSI
Diet	Herbivore: leaves, stems, shoots, fruit, a few insects	Omnivore: berries, roots, fish, mammals, carrion
Behaviour	Social; leads a family troop	Mostly solitary
Lifespan in the wild	About 35–40 years	About 20–25 years
Home	Central and East African forests	North America (Alaska, Canada, northern USA)
Conservation status	Endangered to Critically Endangered	Brown bears Least Concern; grizzlies Threatened in the lower 48 US states

What Is a Silverback Gorilla?

A silverback is an adult male gorilla, usually over 12 years old, named after the silver hair that grows across his back as he matures. He leads a family group, or troop, of up to about 30 gorillas, protecting the females and young and deciding where the group feeds and sleeps.

Size:About 140–200 kg (300–440 lb) and around 1.7 m (5.5 ft) tall when standing upright, with an arm span of up to 2.5 m (8 ft).
Strength:Estimated to be several times stronger than an adult man, with massive shoulders, arms and jaw muscles.
Diet:Mainly leaves, stems, shoots, bark and fruit, with a few ants and termites. A silverback eats up to 30 kg of vegetation a day.
Temperament:Calm and gentle unless his family is threatened.

Learn more in our facts about mountain gorillas, silverback gorilla lifespan and biggest silverback gorilla ever recorded guides.

What Is a Grizzly Bear?

The grizzly bear is a North American subspecies of the brown bear, found mainly in Alaska, western Canada and parts of the northern United States. It is a powerful omnivore and one of North America’s top predators.

Size:Males usually weigh 180–360 kg (400–790 lb). They stand about 1 m (3.3 ft) at the shoulder and over 2 m (7 ft) on their hind legs.
Weapons:Curved claws up to 10 cm (4 in) long and a bite strong enough to crush bone.
Diet:Berries, roots, grasses, salmon, rodents, elk and moose calves, and carrion.
Temperament:Usually avoids people, but can be very aggressive when surprised, defending cubs or protecting food.

Silverback Gorilla vs Grizzly Bear: Head-to-Head

1. Size and Weight

Winner: Grizzly bear. A large male grizzly can weigh nearly twice as much as a silverback. In a physical contest, extra body mass gives a big advantage in power and staying power.

2. Strength

Winner: Grizzly bear, overall. Silverbacks are famous for their upper-body strength, which lets them bend bamboo, tear apart plants and climb with ease. Grizzlies combine great strength with much greater weight. They can flip heavy rocks, dig up dens and bring down elk.

3. Speed and Agility

Winner: Grizzly bear on speed; gorilla on climbing. A grizzly can run at about 56 km/h (35 mph), faster than a silverback’s short bursts of about 32–40 km/h (20–25 mph). But gorillas are better climbers and move easily through dense forest. Read how fast a silverback gorilla can run.

4. Natural Weapons

Winner: Grizzly bear. The grizzly has long claws and a powerful bite built for killing prey. The silverback’s long canine teeth and powerful hands are dangerous, but they are used mainly for display and for fights between rival males, not for hunting.

5. Intelligence

Winner: Silverback gorilla. Gorillas are great apes that share about 98% of their DNA with humans. They use simple tools, communicate with more than 20 distinct calls and gestures, and solve problems. Grizzlies are also intelligent, with excellent memory and smell, but gorillas show more complex social and problem-solving skills.

6. Fighting Experience and Aggression

Winner: Grizzly bear. Grizzlies are predators that hunt, fight other bears and defend food. Silverbacks rarely fight to the death. Most of their conflicts are settled with chest-beating, roaring and bluff charges. Read how to show submission to a gorilla.

Who Would Win: Silverback Gorilla or Grizzly Bear?

The grizzly bear would win in almost every realistic scenario. Its greater weight, claws, bite and experience as a predator outweigh the silverback’s strength and intelligence.

A silverback gorilla might make the fight difficult in thick forest, where he can climb and move quickly. But in a direct clash, the bear’s size and weapons would be decisive.

It is worth remembering that silverbacks are not fighters by nature. In the wild, a silverback would choose to intimidate an intruder or lead his family away rather than fight a large predator.

Where Do Silverback Gorillas and Grizzly Bears Live?

	Silverback gorilla	Grizzly bear
Continent	Africa	North America
Habitat	Tropical and montane rainforests	Forests, mountains, tundra and river valleys
Best places to see	Uganda (Bwindi, Mgahinga), Rwanda, DR Congo	Alaska (Katmai, Denali), Yellowstone, western Canada

Mountain gorillas live only in two areas: Bwindi Impenetrable National Park in Uganda, and the Virunga Volcanoes shared by Uganda, Rwanda and the DR Congo. See the best places to see silverback gorillas and the best places to see gorillas in Africa.

Conservation: Which Animal Is More Endangered?

Gorillas are far more threatened than grizzly bears.

Gorillas:Mountain gorillas are Endangered, with only about 1,063 left in the wild according to the last full census. Western gorillas and Grauer’s gorillas are Critically Endangered. The main threats are poaching, snares, habitat loss and human disease.
Grizzly bears:Brown bears as a species are listed as Least Concern worldwide, with healthy populations in Alaska and Canada. Grizzlies are listed as Threatened in the lower 48 US states, where habitat loss and conflict with people remain problems.

Mountain gorilla numbers are slowly rising thanks to protected parks, ranger patrols and gorilla tourism, which funds conservation. Read about Uganda Wildlife Authority’s fight against poaching and our endangered animals list.

See a Real Silverback Gorilla in Uganda

You will never see a gorilla fight a grizzly, but you can stand just a few metres from a wild silverback on a gorilla trek in Uganda. In Bwindi Impenetrable National Park, rangers lead small groups to habituated gorilla families. You spend one unforgettable hour watching the silverback and his family feed, play and rest.

Plan your trek with our guides:

FAQs: Silverback Gorilla vs Grizzly Bear

Who would win, a silverback gorilla or a grizzly bear? A grizzly bear would almost certainly win, thanks to its greater weight, long claws, powerful bite and experience as a predator.

Is a silverback gorilla stronger than a grizzly bear? Pound for pound, a silverback is extremely strong, especially in the arms and shoulders. But a grizzly is much heavier and stronger overall.

Which is bigger, a gorilla or a grizzly bear? A grizzly bear. Males weigh 180–360 kg (400–790 lb), compared with 140–200 kg (300–440 lb) for a silverback.

Which is faster, a gorilla or a grizzly bear? A grizzly bear, which can reach about 56 km/h (35 mph). A silverback reaches about 32–40 km/h (20–25 mph) in short bursts.

Do gorillas and grizzly bears live in the same place? No. Gorillas live in African rainforests and grizzly bears live in North America, so they never meet in the wild.

Are silverback gorillas dangerous to humans? Rarely. Habituated silverbacks are calm around trekkers who follow the guides’ rules, and they usually bluff-charge rather than attack.

Conclusion: Two Giants, Two Very Different Lives

The grizzly bear is bigger, heavier and better armed, and it would almost certainly win a fight against a silverback gorilla. But the silverback is the smarter animal, a gentle plant-eater and a devoted family protector, and he is far more endangered. Both are icons of the wild that deserve protection.

Want to see a silverback up close? Book a gorilla trekking safari in Uganda with Uganda Wildlife Tours. We arrange your gorilla permit, transport and lodging in Bwindi, so you can spend an unforgettable hour with a wild silverback and his family. Check Uganda gorilla permit availability and book early, because permits sell out.