Common Gibbon (Hylobates lar) adult, walking along vine (captive Stock Photo - Alamy
Our ancestors had floppy, flexible gibbon feet
Gibbons walking like humans Funny Monkeys Lustige Affen - YouTube
Gibbons spring about in funny run : Nature News
Gibbons Daily on Twitter: "Gibbons are the only bipedal species of non-human ape, but due to their extremely long arms they walk quite differently to humans. Their arms are often just flailing