There used to be a video online (which I was going to link to until I noticed it no longer exists) where someone said that a bird's leg muscles were connected to its head muscles...so, when the leg moves, the head moves. That's why I'm asking this question. Is it possible? Is it true? And, do other animals (besides birds) have leg muscles connected to their head muscles?
I kinda doubt it. The head motion of, say, a pigeon seems more a matter of balance and momentum conservation, something like when we swing our arms back and forth as we walk.