A four-year-old siamang or black-haired gibbon native to the Sumatran forest was handed over by residents to the Natural Resources Conservation Agency officers in Lhokseumawe, Indonesia, on August 4, 2021. 

The siamang (Symphalangus syndactylus) has long, dense, shaggy hair, which is the darkest shade of all gibbons. Its long, gangly arms are longer than its legs. The average length of a siamang is 90 centimeters. The largest they have ever grown is 150 centimeters.

According to the International Union for Conservation of Nature Red List of Threatened Species, the siamang is listed as endangered. It is one of the protected animals threatened with extinction due to forest destruction and hunting activities.

(All images via VCG)  

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