Gibbons

Gorillas, chimpanzees and gibbons are all anthropoid apes, having long arms, no tails and highly developed brains.

大猩猩、黑猩猩及长臂猿都是类人猿，它们的前肢很长，没有尾巴，脑子高度发达。

The family group of Hoolock gibbons ( 1 ♀ 1 ♂) was observed and the data of their daily feeding amount were recorded by the focal animal sampling method in spring and autumn from 2007 to 2008.

野外于2007年–2008年春、秋季以焦点动物取样法观察同一家群（1♀1♂）白眉长臂猿，记录日取食量相关数据。

The results showed that gibbons ate 40 parts from 36 botanic species. The feeding characteristics about food unit, feeding speed and weight of one food unit were different between fruits and young leaves.

结果发现，白眉长臂猿取食36种食物的40个部位，其果实的食物单元、取食速度、单个鲜重值等取食特征不同于嫩叶。