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Arca

Bornean orangutan

Pongo pygmaeus

Conservation status IUCN: Critically endangered· CR
Bornean orangutan (Pongo pygmaeus)
Photograph from Wikimedia Commons · Wikipedia article (it)

Where the name comes from

Orangutan comes from the Malay orang hutan, “man of the forest”, from orang, man, and hutan, forest. Pongo is a 16th-century African name for an ape, applied by mistake to the Asian one; pygmaeus, “pygmy”, for the compact build. No other great ape has a name that states its likeness to us so plainly.

Facts

Group
Mammals · Mammalia
Order
Primates
Habitat
Tropical rainforest, forested peat swamp
Range
The island of Borneo
Size
110–140 cm, 30–90 kg
Diet
Omnivore — mostly fruit, then leaves, bark, insects
Lifespan
35–45 years

Characteristics

  • 01

    It is the largest tree-dwelling animal in the world: it spends nearly all its life in the branches.

  • 02

    Adult males develop wide fleshy cheek flanges, a sign of dominance.

  • 03

    It builds a fresh nest of woven branches to sleep in every night.

What sets it apart

Orangutans pass on culture: different groups use different tools, give different calls and eat in different ways, and these behaviours are learnt by imitation, not by instinct. A young orangutan spends up to eight years at its mother’s side — the longest childhood apprenticeship of any animal after us — learning which of the forest’s hundreds of fruits are edible and when they ripen. To lose a population is to lose its knowledge as well.

Next species

Mandrill

Mandrillus sphinx