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Photo: Ioannis Magouras · CC BY (May be cropped or resized)
Pongo abelii
Range
Northern Sumatra
Size
Males about 1.7m tall; females about 90cm
Weight
Males about 90kg; females about 45kg
The Sumatran orangutan is one of the three species of orangutan, found only in the north of Sumatra. It is rarer than the Bornean orangutan but more common than the recently identified Tapanuli orangutan, which is also found on Sumatra (Wikipedia, general species account).
Males grow to about 1.7 m tall and 90 kg, while females are smaller, averaging about 90 cm and 45 kg. Compared with the Bornean species, Sumatran orangutans are thinner and have longer faces; their hair is longer and a paler red (Wikipedia, general species account).