Just in case you were wondering like I was when I first saw this, all these mechanical devices were real. The artist-engineer, Theo Jansen, has made several of these models in other forms, such as 'Beachbeast' and Animaris Rhinoceros.
"Common sense invents and constructs no less than its own field than science does in its domain. It is, however, in the nature of common sense not to be aware of this situation." -Albert Einstein.
"The walls between arts and engineering exist only in our mind."-Theo Jansen