Science News Daily has a report on declining Orangutan populations in Sumatra and Borneo:
The survey found the orangutan population on Indonesia’s Sumatra island dropped almost 14 percent since 2004, Wich said. It also concluded that the populations on Borneo island, which is shared by Malaysia, Brunei and Indonesia, have fallen by 10 percent. Researchers only surveyed areas of Borneo that are in Indonesia and Malaysia.
The number of orangutans on Sumatra has fallen from 7,500 to 6,600 while the number on Borneo has fallen from 54,000 to around 49,600, according to the survey on the endangered apes, which appears in this month’s science journal Oryx.
The decline is linked to continued deforestation and the expansion of palm oil plantations.