Proboscis monkey

The proboscis monkey has a very large nose.

The males have the biggest noses. These big noses help them make loud sounds.

This monkey lives on the island of Borneo. It likes to stay near rivers and water.

The monkey is a very good swimmer. It can even swim under the water.

These monkeys have reddish-brown fur. They also have long tails. Both males and females have big bellies.

The monkeys eat many things. They like to eat fruit and leaves. They also eat seeds and flowers.

Babies are born with blue faces. Their faces change as they grow up. It is a very interesting animal.

The proboscis monkey is a large monkey from Asia.

It lives on the island of Borneo. These monkeys like to stay near water. They live in mangrove forests and near rivers. They are very good swimmers. They can even swim underwater.

Most proboscis monkeys have reddish-brown fur. Both males and females have large bellies. Males have very large noses. This nose is called a proboscis. It may help them make loud calls. The nose is smaller on females. Baby monkeys are born with blue faces. Their faces turn grey and then cream as they grow.

These monkeys live in groups. A group might have one male and many females. They eat many kinds of plants. They like to eat fruit and leaves. They also eat seeds and flowers. Many monkeys are now in danger. This is because they are losing their homes. People also hunt them for food. We must work to protect them.

The proboscis monkey is a very large monkey from Asia.

It is one of the largest monkeys living in that part of the world. These monkeys are found only on the island of Borneo. This island is shared by three different countries: Brunei, Indonesia, and Malaysia. They live in many places like mangrove forests and river areas. They also stay in swamp forests and even on steep cliffs. They usually stay within one kilometer of a water source.

These monkeys have many special ways they work in their homes. They are very good at swimming and can even go underwater. They often jump from tree branches into the water to move around. Most of the time, they live in trees and move by leaping. They eat many kinds of plants, including over 55 different species. They mostly eat fruit from January to May. From June to December, they eat mostly leaves. They even chew their cud to help them digest their food better.

People have known about these monkeys for a long time. Baron Friedrich von Wurmb first showed them to Westerners in 1781. He later sent specimens to a man named Stamford Raffles in Europe. The scientific name for this monkey is Nasalis larvatus. The name Nasalis comes from the Latin word nasus, which means "nose." There are two main types, or subspecies, of these monkeys. One type lives in most of Borneo. The other type, called N. l. orientalis, lives in northeast Kalimantan.

There are many interesting facts about how these monkeys look. Males are much larger than the females. A male can weigh up to 30 kilograms, while a female is smaller. The males have a huge nose called a proboscis. This nose can be more than 10 centimeters long. Scientists think the large nose helps males make louder calls. This might help them attract females. Both males and females have large, bulging stomachs. Baby monkeys are even born with blue faces. Their faces turn grey at 2.5 months and cream by 8.5 months.

Proboscis monkeys live in social groups that change often. A group might have one male and many females. Sometimes, they form larger bands of up to 60 individuals. They often gather together at sleeping sites when night falls. They stay close to rivers to stay safe from predators. These predators include crocodiles, leopards, and large eagles. Today, these monkeys are endangered. Their numbers dropped by more than 50% before 2008. This happened because people cut down forests for oil palm plantations.

The proboscis monkey, known scientifically as Nasalis larvatus, is a large primate native to Asia. It is an arboreal species, meaning it spends much of its life in trees. This monkey is famous for its large, fleshy nose, which is called a proboscis. It is endemic to the island of Borneo, which is shared by Brunei, Indonesia, and Malaysia. Because it is found only in this specific location, it is a very special part of the island's ecosystem.

The biology of the proboscis monkey is defined by significant sexual dimorphism. This means that males and females look very different from one another. Males are much larger than females. A male can reach a weight of 30 kilograms, while females are smaller. The most striking difference is the male's nose. A male's proboscis can exceed 10 centimeters in length and hangs below the mouth. Scientists believe this feature is a result of sexual selection. A larger nose may help males produce louder vocalizations to attract females. The skull of the monkey has specialized nasal cartilages to support this large structure.

Both sexes possess a distinctive bulging stomach, often called a pot belly. This shape is related to their specialized diet. They are seasonal folivores and frugivores, meaning they eat mostly leaves and fruit. They consume at least 55 different plant species. Their eating habits change with the seasons. From January to May, they focus on eating fruit. From June to December, they eat mostly leaves. They even chew their cud to digest their food more efficiently.

Proboscis monkeys are highly adapted to life near water. They are considered perhaps the most aquatic of all primates. They are capable of swimming up to 20 meters underwater. They often swim across rivers to move between areas. While they are excellent swimmers, they are also arboreal. They move through the trees by leaping and moving on all fours. They may even jump off branches to descend directly into the water. They generally stay within one kilometer of a water source. This proximity helps them find food and navigate their habitat.

Socially, these monkeys live in a complex fission-fusion society. This means their group sizes change frequently. They often live in groups consisting of one adult male, several females, and their offspring. These groups usually contain between 3 and 19 individuals. However, they can join together into larger bands of up to 60 individuals. These bands often gather at specific sleeping sites as night falls. While they travel together during the day, individuals only play and groom with members of their own specific group.

History shows that Westerners first learned about this species through Baron Friedrich von Wurmb. In 1781, he made the monkey known to the West. He later sent specimens to Stamford Raffles in Europe. The genus name, Nasalis, comes from the Latin word "nasus," meaning nose. Today, the species is divided into two subspecies. The most common is N. l. larvatus, which lives across most of Borneo. The other is N. l. orientalis, which is restricted to northeast Kalimantan. Some scientists do not even recognize the second subspecies as separate.

Currently, the proboscis monkey is an endangered species. Their population decreased by more than 50% in the 36 to 40 years leading up to 2008. This decline is caused by habitat loss from logging and the creation of oil palm plantations. Hunting is also a threat because the monkey is sometimes treated as a delicacy or used in traditional medicine. They face natural predators as well, including crocodiles, clouded leopards, and large eagles. To help protect them, they are legally protected in all regions of Borneo and live in 16 different protected areas.