Western lowland gorilla

These are western lowland gorillas.

They live in the forests of Africa.

They are very strong. The males have grey hair on their backs. We call them silverbacks.

Gorillas are very smart. They can use sticks as tools. They use them to reach food.

Babies are very small. They cling to their mothers. They ride on their mothers' backs.

Gorillas live in small family groups. They spend much of their day playing.

Western lowland gorillas live in the forests of central Africa. They are the smallest of all gorilla types. Still, they are very big and strong.

Males have grey hair on their backs. We call these males silverbacks.

These gorillas live in small family groups. A group usually has one silverback male. He is the leader and the protector. He keeps the group safe.

Most groups have about four to eight members. Young gorillas love to play. They spend much of their day climbing and swinging.

Gorillas are very smart. They can use tools to help them. For example, they use sticks to reach food in holes.

They can even use a stick to measure how deep water is. Some gorillas have even learned sign language to talk to people.

Baby gorillas are very tiny when they are born. They cling to their mothers' fur. For the first few years, they ride on their mothers' backs.

Mothers care for their babies for a long time.

The western lowland gorilla is a very special type of great ape. It lives in the forests and swamps of central Africa. These lands include countries like Cameroon, Gabon, and the Republic of the Congo. This gorilla is the smallest of all four gorilla subspecies. Even though they are the smallest, they are still incredibly strong.

Most of these gorillas live in the wild. However, some live in zoos around the world. They are considered a critically endangered species. This means there are not many left in nature.

These animals have a very specific way of living. They have black skin and coarse black hair. Most of their body is covered in this hair. Only their faces, ears, hands, and feet are bare. Males look different from females because of their hair color. As males get older, the hair on their backs turns grey. This is why people call them silverbacks.

They often walk on their knuckles with their hands curled. This helps them move through the thick forest plants.

Gorillas live in small family groups. An average group has about four to eight members. A single silverback male usually leads the group. He acts as the protector for the females and babies.

If a male wants to challenge the leader, he must show strength. The leader might roar or pound his chest to stay in charge. Most gorillas are actually very calm animals. They only become aggressive if they feel disturbed. Young gorillas spend much of their time playing and climbing.

Learning and intelligence are big parts of their lives. Western lowland gorillas can use tools to help them find food. They might pick up a stick and strip the leaves off. Then, they use the stick to reach food inside deep holes.

One gorilla even used a bucket to collect water in a zoo. Some gorillas have even learned to use sign language. A famous gorilla named Koko learned over 1,000 signs. She could even put words together to share her thoughts.

Raising a baby is a long job for a mother gorilla. A baby is born very tiny and weighs only a few pounds.

These small infants cling to their mother's fur to stay safe. They ride on her back for the first few years. A mother might care for her baby for up to five years. Females do not have babies until they are 8 or 9 years old. This slow way of growing means their numbers change very slowly. It is important to understand how they live to help protect them.

The western lowland gorilla (Gorilla gorilla gorilla) is a critically endangered subspecies of the western gorilla. These great apes live in the diverse habitats of central Africa. Their range includes montane forests, primary and secondary forests, and lowland swampland. They are found in several countries, including Cameroon, Gabon, the Republic of the Congo, and the Democratic Republic of the Congo. They also live in Equatorial Guinea, Angola, and the Central African Republic. While they are the smallest of the four gorilla subspecies, they possess exceptional size and strength.

Physical characteristics of the western lowland gorilla show clear sexual dimorphism, meaning males and females look different. They have jet black skin and coarse black hair covering most of their bodies. This hair is absent on their faces, ears, hands, and feet. Adult males develop a grey coloration on their backs and rumps. This trait is why older males are called "silverbacks." Males can stand up to 5.5 feet tall and weigh about 350 pounds on average. Females are smaller, averaging around 200 pounds. In captivity, some males have reached much higher weights. They often move in a quadrupedal fashion by walking on their knuckles. Because of this, their arm span is actually greater than their standing height.

Social structures among these gorillas are built around small family units. An average group contains between four and eight members. These groups are typically led by one or more adult males. In many cases, a group with multiple silverbacks consists of a father and his son. The silverback serves as the primary protector of the group. He organizes essential activities like eating, traveling, and nesting. To maintain order, a silverback may use physical displays. He might stand upright, charge, or pound his chest while roaring to cow challengers.

Reproduction in this species is a slow and careful process. Females do not reach sexual maturity until they are 8 or 9 years old. After a gestation period of nearly nine months, a female gives birth to a single infant. These newborns are very small, weighing only about 4 pounds. Infants cling to their mother's fur and ride on her back for several years. Mothers may remain dependent on their offspring for up to five years. Because females produce few offspring, the population grows slowly.

Western lowland gorillas demonstrate significant intelligence through tool use. They can fashion natural materials to help them gather food more easily. For example, they may select a branch and remove leaves or bark. They modify the length of the stick to match the depth of a hole. This behavior shows high-level sensorimotor intelligence.

In one instance, a gorilla used a stick to measure the depth of water. In a zoo setting, a gorilla was even observed using a bucket to collect water. This shows they can adapt to new objects to meet their needs.

Communication and cognitive abilities have also been studied extensively. A famous example is Koko, a gorilla born in 1971 at the San Francisco Zoo. Researchers worked with Koko to teach her American Sign Language. She eventually mastered over 1,000 signs. Koko could even combine up to eight words to express thoughts, wants, or needs. Other studies have shown that gorillas can learn to exchange items with humans. They quickly understand the concept of receiving a reward, like fruit, in exchange for a twig.

Scientific study has also revealed unique genetic events in this subspecies. A male named Snowflake, who lived at the Barcelona Zoo, was the only known albino gorilla. He was born in the wild in Equatorial Guinea. Scientists identified his albinism as a non-syndromic type caused by a specific genetic variant. This variant was located in a region of the SLC45A2 transporter. Because albinism is a recessive allele, Snowflake's condition revealed that his parents were uncle and niece. This provided the first evidence of inbreeding within western lowland gorilla populations.