Borneo orangutan Photo credit Milo Galaga

ORANGUTANS

Orangutans live in Indonesia and Malaysia. Today, they can only be found on Borneo and the north of Sumatra. They do not live in large groups like gorillas and chimpanzees, but are solitary, with males living alone and females living with their offspring. Young stay with their mother until they reach puberty. Also unlike gorillas and chimpanzees, orangutans are mainly arboreal, spending most of their time in the trees. There are three species of orangutans: Sumatran orangutans (Pongo abelii), Tapanuli orangutans (Pongo tapanuliensis), and Bornean orangutans (Pongo pygmaeus).  

Sumatran Orangutan

 

Scientific name

IUCN Red List Status

Countries

Estimated Number

Pongo abelii

Critically Endangered

Indonesia (Sumatra)

13,900 (5,400-26,100)

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Tapanuli Orangutan

Scientific name

IUCN Red List Status

Countries

Estimated Number

Pongo tapanuliensis

Critically Endangered

Indonesia, (Sumatra)

800 (300-1,400)

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Bornean Orangutans

(Pongo pygmaeus)

Northwest Bornean Orangutan

Scientific name

IUCN Red List Status

Countries

Estimated Number

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Pongo pygmaeus pygmaeus

 

Critically Endangered

Indonesia (Sumatra)

6,300 (4,700-8,600)

Northeast Bornean Orangutan

Scientific name

IUCN Red List Status

Countries

Estimated Number

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Pongo pygmaeus morio

Critically Endangered

Indonesia (Sumatra)

30,900 (22,800-44,200)

Southwest Bornean Orangutan

Scientific name

IUCN Red List Status

Countries

Estimated Number

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Pongo pygmaeus wurmbii

Critically Endangered

Indonesia, (Sumatra)

97,000 (73,800-135,000)