His swinging motion is a technique known as brachiation. Gibbons have evolved long, strong forearms. Highly mobile joints in their shoulders and wrists enhance their fluid movement.
Females are a paler buff color like Samar's mother.
Gibbons are typically monoganous and his parents have been together for many years.
For Gibbons the occasional fall is part of life.
The important thing is to catch another branch and keep on swinging.