Last updated: December 29, 2022
Verified by: AZ Animals Staff
© Jeff W. Jarrett/Shutterstock.com

The biggest of the world's primates!


Gorilla Scientific Classification


Read our Complete Guide to Classification of Animals.

Gorilla Conservation Status

Gorilla Locations

Gorilla Locations

Gorilla Facts

Main Prey
Leaves, Fruit, Flowers
Fun Fact
The biggest of the world's primates!
Rainforest and dense jungle
Human, Leopard, Crocodile
Average Litter Size
  • Troop
Favorite Food
The biggest of the world's primates!

Gorilla Physical Characteristics

  • Grey
  • Black
Skin Type
Top Speed
25 mph
35-50 years
100-200kg (220-440lbs)

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“The gorilla is one of the closest living relatives to humans.”

The name gorilla actually refers to four different subspecies of animals. They share 98 percent of their DNA with humans, and they are smart enough to learn sign language and use tools. Gorillas are far from the wild, violent beasts portrayed in entertainment, and they could even be considered rather shy. The wild population of gorillas is in rapid decline, and they are critically endangered. The average gorilla is as much as four times as strong as a human.

Gorilla Infographic
There are only 320,000 gorillas left in the wild.

6 Incredible Gorilla Facts!

  • Despite their massive size and impressive strength (learn about the strongest animals in the world here), these great apes are primarily vegetarians.
  • Wild gorillas live only 35 years, but the oldest captive gorilla lived until the age of 63.
  • An adult is capable of bending an iron bar with only their hands.
  • These animals are actually quite shy, and they will normally choose to flee if given the opportunity when threatened.
  • Healthy adults have no natural predators.
  • Ape vs. Gorilla: Gorillas are larger than other ape species and can weigh twice as much as the largest orangutans and more than five times the size of mandrills!

You can check out more incredible facts about gorillas.

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Scientific Name

Gorilla is the genus that is commonly used to refer to two species of great apes that are divided further into four total subspecies. The western gorilla (Gorilla gorilla) is split into the western lowland gorilla with the scientific name Gorilla gorilla gorilla and the Cross River gorilla (Gorilla gorilla diehli). The eastern gorilla (Gorilla beringei) is comprised of the eastern lowland gorilla (Gorilla beringei graueri), which is also known as the Grauer’s gorilla, and the mountain gorilla with the scientific name Gorilla beringei beringei. These scientific names are typically abbreviated with initials for the genus and species while the subspecies are spelled out like G. g. gorilla.

These animals are members of the class Mammalia, the order Primates, and the family Hominidae. The term gorilla itself originates from a word in the ancient African local dialect along the west coast of the continent that translates roughly into a hairy person. This was first recorded by an explorer in the region over 2,500 years ago.

Eastern lowland gorilla — silverback male

Gorillas are members of the class Mammalia, the order Primates, and the family Hominidae.


Evolution and Origin

The evolutionary history of gorillas is not well understood. However, population genetic data has helped researchers better understand the evolution of this species. Molecular geneticists have determined that the population of gorillas split into two groups (western and eastern gorillas) around 77,700 years ago.

The closest relatives of gorillas are humans and chimpanzees. They all diverged from a common ancestor about 7 million years ago. Human gene sequences differ from gorilla sequences by only 1.6% on average. Gorillas were previously thought to be a single species with three subspecies (western lowland, eastern lowland, and mountain gorillas), but it is now agreed that there are two main species, and they each have two subspecies. They all developed from a single type of gorilla during the Ice Age when their forest habitats shrank and became isolated from each other.

Not the left, a human Skelton, on the right a gorilla Skelton. Three walls (L-r, brown,yellow,blue) are behind the display which appears to be in a museum. On the yellow wall is a poster with a photograph of a male presenting human in a business suit (jacket, trousers,tie) carrying a brief case in his right hand,, with indecipherable verbiage underneath. The blue wall has raised white letters that spell MAN AND THE - rest out of frame. A paragraph of white letters below with information regarding the display.

Human gene sequences differ from gorillas by only 1.6 percent!

©Cliff from Arlington, Virginia, USA, CC BY 2.0, via Wikimedia Commons – License

Appearance and Behavior

This is an impressively strong animal, and its appearance backs that up. They possess thick chests with wide shoulders and an abdomen that is pushed forward. Adults have long, heavily muscled arms that they use to help propel themselves on their knuckles. Gorillas are covered in black fur except for their faces, hands, and feet; older males also have bare chests. Adult males develop gray or silver hairs in a saddle pattern on their lower back which is why mature males are often referred to as silverbacks. Mountain gorillas have noticeably longer hair than the other three species. Gorillas have truly unique skulls within the animal kingdom.

Male gorillas can grow to nearly five and a half feet tall, with their weight ranging between 300 and 485 pounds. Females generally stay below five feet tall and weigh 150 to 200 pounds. Gorillas living in captivity tend to grow fat and may be much heavier than their wild cousins. The largest recorded gorilla in captivity was Phil of the St. Louis Zoo, who died weighing 776 pounds; that’s bigger than a grizzly bear!

Despite their reputation in the entertainment industry as aggressive, gorillas are actually quite shy unless threatened or harassed. They live in family groups ranging from six members up to 30 that are led by one or two related silverbacks. Generally, the leadership pair are father and son, but it is not uncommon for brothers to lead a troop. The remainder of the group is comprised of females, infants, and juveniles. They are active during the day and primarily move to feed.

Learn more about the toughest animals in the world here.

A male silverback mountain gorilla in the Volcanoes National Park, Rwanda

Male gorillas can grow to nearly five and a half feet tall, with their weight ranging between 300 and 485 pounds. Females generally stay below five feet tall and weigh 150 to 200 pounds

©Jurgen Vogt/Shutterstock.com


While all gorillas inhabit the tropical forests of Africa, the specific habitat of gorillas varies widely depending on which of the subspecies you are talking about. The western lowland gorilla lives in the rainforests between Cameroon and the Congo River. The Cross River gorilla resides in only a small forest area between Nigeria and Cameroon, directly on the Cross River. Grauer’s gorilla lives in the rainforests of Congo, and the mountain gorilla lives in the mountain forests of the border region of Rwanda, Uganda, and Congo.

A group of gorillas is called a troop or a band. A troop claims an area between one and 16 square miles, and they will walk short distances throughout that territory to feed. Several bands may inhabit the same area without conflict. They will build nests of vegetation every night, either on the ground or in trees.

Family of gorillas

A group of gorillas is called a troop or a band. A troop claims an area between one and 16 square miles, and they will walk short distances throughout that territory to feed.

©Marian Galovic/Shutterstock.com


Most of these animals are vegetarian, but the western lowland gorilla also eats insects.

What eats gorillas?

The short answer is not much. Leopards possess the ability to kill young animals, but they do not have many opportunities since the young rarely stray far from the adults. Scavengers will eat these animals who die from natural causes or injury, but there are no true predators for healthy gorillas.

What does a gorilla eat?

Eastern gorillas thrive on leaves, shoots, and stalks of many different plants, while western gorillas eat more fruit. The western lowland gorilla will smash open termite and ant mounds to eat the insects inside and has been known to eat snails as well. These animals can eat as much as 40 pounds of plant matter per day.

If you’re looking for the full details on what gorillas eat, check out our ‘What Do Gorillas Eat‘ guide!

What Do Gorillas Eat
Gorillas eat leaves, bamboo shoots, fruits, and termites.

Predators and Threats

As mentioned earlier, the only true predator of these animals is a leopard. Leopards don’t commonly hunt gorillas due to their sheer size and strength. It makes much more sense for them to focus on less dangerous prey.

Sadly, the greatest threat to these animals comes from humans. Exposure to disease, deforestation, trophy hunting, and even subsistence hunting to feed logging crews have all taken a terrible toll on the gorilla population. Since they share 98 percent of their DNA with humans, many of the diseases that affect our race are also faced by gorilla populations. That is why conservation efforts have focused on eliminating physical contact between humans and wild gorilla populations, as their immune systems can’t handle the diseases that humans transmit.

Mountain Gorilla

The greatest threat to gorillas is humans. Exposure to disease, deforestation, trophy hunting, and even subsistence hunting to feed logging crews have all taken a terrible toll on the gorilla population.

©Ondrej Prosicky/Shutterstock.com

Reproduction, Babies, and Lifespan

Females reach sexual maturity around the age of seven or eight years old. Their gestational period is approximately eight and a half months long. On average, they give birth to a sole baby every four years or so. Males mature more slowly, and they attain maturity between 12 and 13 years. Upon reaching maturity, males leave the troop and form their own with adult females that they kidnap from other bands during raids. The juveniles of the troop are all fathered by the one or two silverbacks that lead the group.

A baby is entirely helpless from birth to around three months and spends a good amount of time being carried in its mother’s arms. They also possess the ability to fiercely cling to their mother’s chest or back, but they are not able to care for themselves or walk during that time. A baby gorilla weighs only four to five pounds at birth.

Wild gorillas live anywhere between 20 and 40 years, while captive animals have been known to live well into their 40s. Until recently, the oldest known gorilla living in captivity was a female western lowland gorilla named Trudy. She died at the age of 63 in Little Rock Zoo in 2019. She was also believed to be the last captive gorilla in North America that was captured in the wild. As of 2021, a gorilla named Fatou is believed to be 64 years old. This makes Fatou the oldest gorilla in the world.

Eastern lowland gorilla adult and baby

Gorillas give birth to a sole baby every 4 or 5 years.



All species are currently considered to be critically endangered, and their populations are all in decline. Only 4,000 eastern lowland gorillas and 880 mountain gorillas are estimated to be in the wild. Of both of those groups, only 2,600 are mature adults. Approximately 300,000 western lowland gorillas are living, but they are experiencing a double-digit percentage population decline. Only 250 to 300 Cross River gorillas remain in a small region surrounding the Cross River.

Gorillas In the Zoo

These animals can be found in almost any major zoo. All gorillas in zoos in the United States are western lowland gorillas, and they were all born in captivity. None of these animals were captured in the wild. Both the Detroit Zoo and the Bronx Zoo are well-known for their gorillas.

Baby Eastern gorilla in Congo rainforest

All species of gorillas are critically endangered.

©Katja Tsvetkova/Shutterstock.com

4 Types of Gorillas

There are two main types of gorillas in the world- eastern and western species. Both of these species contain subspecies. Eastern gorillas include the mountain and eastern lowland subspecies. Western gorillas include the Cross River and western lowland subspecies. All of these gorillas live in tropical and subtropical regions of Africa. The key difference between them is size, with eastern gorillas typically being larger than western gorillas. However, both types of gorillas are endangered due to the destruction of their natural habitats.

  • Cross River Gorilla – Only 200-300 Cross River gorillas are left in the world, making them critically endangered. They live in the forests and rainforests of Cameroon and Nigeria, an area of about 3,000 square miles. However, their habitat is being destroyed by humans who clear the forests for timber and create fields for agriculture and livestock. Additionally, poaching is a problem in the area, which further contributes to the decline in the Cross River gorilla population.
  • Mountain Gorilla – The mountain gorilla is a subspecies of gorilla that lives in forests at high altitudes, between 8,000 and 13,000 feet. They are found in Rwanda, Uganda, and the Virunga Mountains in the Democratic Republic of Congo. Mountain gorillas are slightly larger than other gorilla subspecies and can weigh up to 440 pounds. They have thick fur, which helps them stay warm in colder temperatures. However, as humans move into their habitat, the gorillas are forced to move to higher and more dangerous ground. The mountain gorilla is critically endangered, with a population of only 880 remaining.
  • Western Lowland Gorilla – The Western Lowland is the most numerous of all gorillas. They are found throughout the region from Cameroon to the Republic of Congo. Most of these gorillas live in isolated swamps and the Republic of Congo. Compared to other subspecies, they are smaller and have brown-grey coats and auburn chests, wider skulls, and smaller ears. However, they also are about 4 to 5 1/2 feet tall and weigh 440 pounds. Due to poaching, the population has decreased by more than 60% within the last 20-25 years. They are considered critically endangered.
  • Eastern Lowland Gorilla – The Eastern Lowland is the largest of the gorilla subspecies and inhabits the tropical rainforests of the Democratic Republic of Congo. In the last 50 years, their historical range has decreased significantly, and they now only occupy about 13% of their original range. They are also critically endangered due to factors such as poaching.
Gorilla bite force - gorilla resting

There are four subspecies of gorilla, all crucially endangered.

©AB Photographie/Shutterstock.com

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About the Author

Heather Hall is a writer at A-Z Animals, where her primary focus is on plants and animals. Heather has been writing and editing since 2012 and holds a Bachelor of Science in Horticulture. As a resident of the Pacific Northwest, Heather enjoys hiking, gardening, and trail running through the mountains with her dogs.

Gorilla FAQs (Frequently Asked Questions) 

Are Gorillas herbivores, carnivores, or omnivores?

Most gorillas eat a mostly vegetarian diet; however, their occasional intake of insects, worms, and snails makes them technically omnivorous.

What Kingdom do Gorillas belong to?

Gorillas belong to the Kingdom Animalia.

Who would win in a fight that pits a gorilla vs. a lion?

If a gorilla fought a lion, the lion would likely come out on top. We analyzed this full hypothetical showdown in our article ‘Gorilla vs. Lion: Who Would Win in a Fight?‘ if you want to see the full details.

That being said, while lions are often called the “king of the jungle” their territories rarely overlap. Lions rarely venture into areas that are wooded enough for gorillas to inhabit.

What class do Gorillas belong to?

Gorillas belong to the class Mammalia.

What phylum to Gorillas belong to?

Gorillas belong to the phylum Chordata.

What family do Gorillas belong to?

Gorillas belong to the family Hominidae.

What order do Gorillas belong to?

Gorillas belong to the order Primates.

What type of covering do Gorillas have?

Gorillas are covered in hair.

What genus do Gorillas belong to?

Gorillas belong to the genus Gorilla.

In what type of habitat do Gorillas live?

Gorillas live in rainforests and dense jungles.

What is the main prey for Gorillas?

Gorillas eat leaves, fruit, and flowers.

What are some predators of Gorillas?

Predators of Gorillas include humans, leopards, and crocodiles.

How many babies do Gorillas have?

The average number of babies a Gorilla has is 1.

What is an interesting fact about Gorillas?

Gorillas are the biggest of the world’s primates!

What is the lifespan of a Gorilla?

Gorillas can live for 35 to 50 years.

How fast is a Gorilla?

A Gorilla can travel at speeds of up to 25 miles per hour.

How strong is a gorilla?

Gorillas are estimated to be five to eight times stronger than a human. Studies cited in the Guinness Book of World Records from the early 20th century have been recently called into question, but gorillas remain extremely powerful even without specific facts detailing precisely how strong they are. They are by far the strongest of the great apes.

What animal can kill a gorilla?

The gorilla’s only natural predator is the leopard, and even they very rarely actively hunt juvenile gorillas. Crocodiles and anacondas share a habitat with them and can be deadly to gorillas, but these attacks only occur on rare occasions. The most dangerous animal for the gorilla is unfortunately the human.

Is a gorilla stronger than a human?

A gorilla is much stronger than a human. Estimates vary, but conservatively gorillas are known to be several times as strong as a human.

Do gorillas eat monkeys?

Gorillas do not eat monkeys. While a recent study revealed monkey and deer DNA in gorilla feces, it is surmised that the DNA resulted from gorillas consuming insects that had scavenged the other animals, or that the other animal DNA was added after the other animals had contact with the feces in the wild.

Can a gorilla kill a human?

While gorillas are not the highly aggressive apes reminiscent of King Kong, they are extremely strong and can easily be a deadly threat to humans under the right conditions. When provoked, a gorilla will engage in threatening behavior in an attempt to scare off the other party. If these threats are ignored, then an attack is a definite possibility. According to research surveyed by the BBC, even documented gorilla attacks on humans rarely prove to be fatal, and no known reports exist of a captive gorilla ever killing a human.

How much do gorillas weigh?

On average, wild male gorillas weigh 300 to 485, and wild females’ weight varies from 150 to 200 pounds. Captive gorillas grow much heavier with the largest recorded specimen tipped the scales at an impressive weight of 776 pounds even after a fatal illness.

What's the difference between gorillas and chimpanzees?

Chimpanzees differ from gorillas in their appearance and size. Gorillas far outweigh chimpanzees, and chimpanzees live in slightly different habitats when compared to gorillas.

Who would win a fight between a Komodo dragon and a gorilla?

A gorilla would beat a Komodo dragon in a fight. Many people believe that Komodo dragons are venomous. While that is true in a sense, they don’t have a venom that will paralyze and knock out their prey. In fact, many of their victims die from exsanguination and brutal soft tissue damage.

Who would win in a fight between a leopard and a gorilla?

A leopard would win a fight against a gorilla. It is too fast and vicious for a strong gorilla to fight off.

Who would win in a fight between a gorilla and a kangaroo?

A gorilla would win a fight against a kangaroo.

How do gorilla teeth compare to human teeth?

Gorilla teeth are much larger than human teeth, especially their canines! However, they actually share significant similarities. Find out more here!

Mandrill vs Gorilla: Who Would Win A Fight?

A gorilla would win a fight against a mandrill without much effort. When provoked to anger, gorillas become fierce creatures that show off their strength, speed, agility, and intelligence by systematically maiming their foes. They are much stronger than mandrills, and they have a massive size advantage where they can be over five times their size.

What are the key differences between gorillas and monkeys?

The key differences between gorillas and monkeys are classification within the primate order, diet, and size.

Thank you for reading! Have some feedback for us? Contact the AZ Animals editorial team.

  1. Britannica, Available here: https://www.britannica.com/animal/Gorilla-primate-genus#ref1238267
  2. Sea World, Available here: https://seaworld.org/animals/all-about/gorilla/classification/
  3. Reference, Available here: https://www.reference.com/pets-animals/group-gorillas-called-bb9de84be6168fae
  4. National Geographic, Available here: https://www.nationalgeographic.com/animals/mammals/facts/mountain-gorilla
  5. BBC Earth, Available here: http://www.bbc.com/earth/story/20160531-how-violent-are-gorillas-really
  6. ABC News, Available here: https://abcnews.go.com/US/wireStory/trudy-believed-oldest-gorilla-captivity-dies-63-64575550

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