Sumatran orangutans predicted to be extinct in the next few years.

This has been caused primarily by human activity (intense illegal logging, conversion of forest to palm oil plantations and timber estates, mining, clearing forest for settlements, and road construction) and also by large-scale fires facilitated by the El Nino weather phenomena. Additionally, the illegal animal trade has been a factor in the decline of wild orangutan populations. Finally, orangutans are occasionally hunted and eaten by some of the indigenous peoples of Borneo as well as migrant loggers and plantation workers who do not have dietary prohibitions against eating primate bushmeat.

This photo shows a heavily logged concession affiliated with Asia Pulp and Paper, or APP, one of the world’s largest papermakers, on the Indonesian island of Sumatra.

At one time the world’s wild orangutan populations likely included upward of hundreds of thousands of individuals, but current estimates indicate far fewer wild orangutans now remain. During the past decade orangutan populations have probably decreased by 50% in the wild. Although past climate shifts may have been responsible for some of this decline, orangutans are primarily threatened by human activities and development that cause the loss and degradation of their forest habitats. Currently, the IUNC has classified both the Bornean and Sumatran Orangutan as Critically Endangered

The most recent estimates of orangutan population sizes and distributions can be found at the IUCN Red List of Threatened Species Website. The IUCN Red List assessments show that approximately 14,600 Sumatran orangutans (Pongo abelii) remain in the wild. The Bornean orangutan (Pongo pygmaeus) populated is estimated to be about 104,700 individuals. Due to substantial orangutan habitat loss on both islands, it is probable that current numbers on both islands are actually below those given on the IUCN Red List. Approximately 2,000-3,000 Bornean orangtuans were killed every year in the past four decades alone, representing a loss of more than 50% of the original population in just 40 years. At this rate of killing, orangutan populations could be reduced to extinction in the next 50 years.

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