Chicken/Pigeon Heads and Stabilization

Sitting at a train station today I watched a pigeon walk about bobbing its head. Why does this happen? According to leading theories, it has to do with the need to stabilize their visual surroundings when they move. In contrast, we depend on our eyeballs not our heads to move and stabilize our view. I found this interesting link that explains it a bit with more references linked. This isn’t a new fact to me; a classmate actually told me about this last year.

But here are some fun examples of it in ads!

An LG camera parody:

A Mercedes-Benz car commercials: