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Orangutans display significant sexual dimorphism; females typically stand 115 cm (45 in) tall and weigh around 37 kg (82 lb), while adult males stand 137 cm (54 in) tall and weigh 75 kg (165 lb). Compared to humans, they have proportionally long arms, a male orangutan having an arm span of about 2 m (6 ft 7 in), and short legs.
Close-up of an adult male, Tierpark Hagenbeck, Hamburg. Male Sumatran orangutans grow to about 1.7 m (5.6 ft) tall and 90 kg (200 lb), while females are smaller, averaging 90 cm (3.0 ft) and 45 kg (99 lb). Compared to the Bornean species, Sumatran orangutans are thinner and have longer faces; their hair is longer and has a paler red color. [5]
Until well into the 19th century, juvenile orangutans were taken from the wild and died within short order, eventually leading naturalists to mistakenly assume that the living specimens they briefly encountered and skeletons of adult orangutans were entirely different species. [5]
There are three types of orangutans left in the world. The Bornean, the Tapanuli and the Sumatran. It’s believed that there are only 14,000 individual Sumatran orangutans left in the wild.
An orangutan peeling a banana with its hand and foot. The Bornean orangutan diet is composed of over 400 types of food, including wild figs, durians (Durio zibethinus and D. graveolens), [29] leaves, seeds, bird eggs, flowers, sap, vines, [30] honey, fungi, spider webs, [30] insects, and, to a lesser extent than the Sumatran orangutan, bark.
However, the discovery of a previously unknown orangutan population in Malaysian Borneo is reason to hope. Threats. Human actions have reduced orangutan habitats by more than 80% over the past 20 ...
Image credits: thootly #5 Orangutans Self-Medicate. A Sumatran Orangutan in Indonesia has been observed healing a nasty wound on its face by making a paste from a native plant known to locals as ...
The Tapanuli orangutan ... The holotype of the species is the complete skeleton of an adult male ... in height and 70–90 kg (150–200 lb) in weight ...