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Orangutans are found exclusively in the South Asian countries of Malaysia and Indonesia. In fact, the name “orangutan” comes from the Malay word meaning “person of the forest.” There are two species of orangutans: Bornean and Sumatran. These two types of orangutans are found in the rainforests on the islands for which they are named, and have slight differences in appearance and behavior. These species live primarily in a habitat of peat swamp forests.
Orangutans are extremely intelligent and prefer being solitary more than other apes, particularly the males. Orangutan mothers stay with their young ones sometimes up to 8 years of age, the longest for any great ape. Orangutans have an enormous arm span that can sometimes reach up to 7 feet, stretched from fingertip to fingertip, while their average height is just about 5 feet. This adaptation is to suit their lifestyle, which is mostly spent among the trees of the tropical rainforests. On average, orangutans spend about 90% of their time on top of trees, sleep in nests they make atop leafy branches and use large leaves as cover in case of rain. This dependency on trees is one of the reasons why they are found in such a few places. Their diet is also dependent on trees, consisting of fruits, leaves, bark, insects and very rarely egg or meat of small vertebrates that live among the trees. Fruits make up 60% of the Orangutan’s diet, particularly mangoes, mangosteens, lychees, and figs.
In Sumatra, the population of orangutans can only be found in the provinces of Aceh and North Sumatra. In Borneo, they are found in Sarawak and Sabah in Malaysian Borneo and Central, East and West Kalimantan in Indonesian Borneo. Today, their population is being threatened by deforestation and endangerment of habitat due to palm-oil and acacia plantations. Illegal animal trade is a rising cause of concern in which both the young and the mother ape are at risk of falling into the hands of poachers.
Both the Bornean orangutan and the Sumatran orangutan are endangered species, and according to the World Wildlife Fund, currently there are just 41,000 Bornean and just 7,500 Sumatran orangutan left in total. It is estimated that a hundred years ago the population of Orangutans was more than 230,000.
Some places where one can see orangutans include national parks, rehabilitation centers, and wildlife reserves, such as the following:
- Batang Ai National Park
- Danum Valley
- Gunung Leuser National Park
- Ketapang Orangutan Sanctuary
- Kinabatangan Wildlife Sanctuary
- Lamandau River Wildlife Reserve
- Maliau Basin Conservation Area
- Matang Wildlife Centre
- Quarantine Centre at Batu Mbelin
- Rainforest Discovery Centre
- Rasa Ria Nature Reserve
- Semenggoh Orangutan Centre
- Sepilok Orangutan Rehabilitation Centre
- Tanjung Puting National Park
Below is the taxonomic data on Bornean Orangutan from the IUCN Red List of Threatened Species:
Kingdom – Animalia
Phylum – Chordata
Class – Mammalia
Order – Primates
Family – Hominidae
(Note: the data above is the same for both Bornean and Sumatran orangutans)