I have recently come across a couple of caterpillars during my wanderings.  One of them was in the parking lot at work while another was out on a trail.  Caterpillars are strange creatures because they only have a few “legs” which are bunch up together with one other at the other end of the body.  No doubt, a specialist would be cringing right now at the inadequacy of my description.  The result is that the motion of the body is quite complex.  Video is the best way to demonstrate this so I used the phone to get some footage including when the sun angle really helped to emphasize the complexity of the movement.