The Gibbon is in rapid decline and is expected to go extinct.
So say primate experts who have made a call to action to save the crested gibbons of southeast Asia, which are the most vulnerable group of all apes.
For example, just 20 Hainan gibbons survive on one island in China, making it the world's rarest ape species.
Experts highlighted the status of the apes at the XXII Congress of the International Primatological Society.
"The crested gibbons are the most threatened group of primates and all species require urgent attention to save them from extinction", says Dr Thomas Geissmann, a world-renowned gibbon expert based at the University of Zurich in Switzerland, and advisor on the apes to conservation organisation Fauna and Flora International (FFI)
Read the full BBC article here.