Bipedalism in Gibbons!
Sometime in September during one of the trips to Panti Forest Reserve in Johor, we watched a White-handed Gibbon forging on the ground and after a while to our astonishment it stood and simply walked across to the other side of road and climbed up the tree!
I have known Gibbons to display bipedalism in captivity but seeing one walking in the wild was quite a surprise and felt happy and excited.
White handed Gibbon
Panti Bird Sanctuary | Malaysia