Facultative bipedalism
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A facultative biped is an animal that is capable of walking or running on two legs, as a response to exceptional or discretionary circumstances, while normally walking or running on four limbs or more
A capuchin monkey standing on two legs.
A chimpanzee standing on two legs.
The central bearded dragon (Pogona vitticeps), is capable of bipedalism.
A reconstruction of a Teratophoneus and Parasaurolophus running on two legs
Bipedalism
Videos
Bipedalism is a form of terrestrial locomotion where an animal moves by means of its two rear limbs or legs. An animal or machine that usually moves in a bipedal manner is known as a biped, meaning 't
Facultative bipedalism
…A facultative biped is an animal that is capable of walking or running on two legs (bipedal), as a response to exceptional or discretionary (facultative) circumstances, while normally walking or running on four limbs or more. In contrast…
An ostrich, the co-fastest extant biped at 70 km/h (43 mph)
A Man Running; by Eadweard Muybridge
A group of children racing
ASIMO – a bipedal robot