There are three identified species of orangutan – the Sumatran, Tapanuli and Bornean. Bornean orangutans (Pongo pygmaeus) are the third heaviest living primate after two gorilla species. Studies have indicated that there are three subspecies on Borneo. The orangutans of Southwest Borneo (Pongo pygmaeus wurmbii) are the largest and most populous of the three Bornean […]
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