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A male skywalker gibbon
Pengfei Fan
Gibbons get up early when they want fruit for breakfast, showing a capacity for planning that has rarely been documented in wild animals.
Skywalker gibbons (Hoolock tianxing) forage over a range of 1 to 3 square kilometres, feeding on a variety of fruits and leaves.
Pengfei Fan at Sun Yat-sen University in Guangzhou, China, and his colleagues studied two groups of skywalker gibbons in the Gaoligongshan National Nature Reserve in south-west China for around five years. They followed gibbons from the trees where they slept to those …
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