Description of the Dutch Monkey
Proboscis monkeys (Nasalis larvatus) or Dutch monkeys, are
an endemic primate species of Borneo. Nasalis larvatus as its scientific name
means long-nosed monkeys. The large and long nose of Proboscis is a very unique
feature. This unique organ is the identification key of this species.
Proboscis has a reddish brown color and gray limbs. In fact,
when people first see it, maybe they don't think it's a Monkey because of how
it looks. Thus, it is not surprising to say that Bekantan is one of the most
iconic animals in Borneo.
Male Proboscis monkeys have larger noses than females one.
It is believed that a larger nose make a male Proboscis monkeys more attractive
for females. The nose can reach 7 inches long.
Male Proboscis monkeys can weigh 56 pounds, while the
females almost around 20. This size proportion is greater than other primates.
These monkeys also have very large bellies.
Proboscis Monkeys Classification
Kingdom: Animalia
Class: Mammals
Order: Primates
Family: Cercopithecidae
Subfamily: Colobinae
Genus: Nasalis
Scientific name: Nasalis larvatus
Distribution
Borneo is the only location known to be the natural habitat
of Proboscis monkeys. This rainforest animals can be found live in the lowlands
rainforest or around swamps foret. And, the never straying far from rivers. A sicnificant population can
be found in Danau Sentarum National Park where they are well protected from
poachers.
Behavior
Bekantan shouts can be very hard. It is believed that a
large nose allows them to shout louder than other monkeys.
Proboscis monkeys can live in groups ranging from 10 to 30
individu. However, Proboscis monkeys are not always in the same group. They can
move from one group to another. This behaviour is very different from most
other groups of Monkey species.
Dutch macaques can swim very well. This ability allows them to move from one island to another in their habitat. This also gives them a place to calm down and have fun or play. Proboscis can be seen walking in an upright position along the road in the forest.
Adult male of Proboscis Monkey are primates that apply the
harem system. This allows the male to have several females to socialize and
mate. They also help care for young children.
Diet / Food
Proboscis monkeys don't eat more than other monkeys, but
their bodies look like that. This is related to their body shape in the abdomen
that looks bloated. The food of proboscis monkey consists of shoots and leaves.
They will also consume small insects.
Reproduction
Mating process are starts by the females, and that can occur
during any period of the year. Usually, They will do it only if there is a lot
of food.
New Proboscis monkeys are born around 160 days after mating
occurs. They have a bluish color on their faces at birth but soon, it will turn
pink.
Juvenile males must leave the group when they are around 1½
years old. Female can last a lifetime if they want to. The Proboscis Monkey has
a short life span of around 13 years. In captivity they can live up to 30
years.
Conservation
Deforestation has caused a sharp decline in the number of
proboscis monkeys in the wild. Presently, it is estimated that there are only
around 1,000 of this rainforest animals left. As a result they are strictly
protected by the Indonesian government. There are severe penalties for those
who kill them.
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