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The world’s oldest Sumatran orangutan research station has been swept away by the floods in Aceh.
The Ketambe Research Station, located in the village of Ketambe in Aceh Tenggara, is now gone.
Cyclone Senyar devastated Sumatra on 25 November, the critically endangered primates have not been seen in the area, conservation workers say.
Their absence has fuelled speculation as to whether the great apes were swept away by floods and landslides. And while some believe the animals may have travelled to a safer location, a carcass found in the area, said to be that of an orangutan, is fueling conservationists' fears.
More than 900 people have died as a result of heavy rain, floods and landslides since Cyclone Senyar ravaged parts of Indonesia in late November. Hundreds are still missing, with many villages in Sumatra completely destroyed as the storm swept across the island.