Chicken have a bad reputation, which I would like to restore in my first post. It is well known that they are surprisingly bad at adapting their picking when their vision is shiftet by prismatic goggles (yes, chicken prismatic goggles do exist). In fact, they are so bad at it that they may starve before finding a way to correct their ballistic head movements to feed themselves.

However, there is one thing they do impressively well, namely to keep their head stable while moving their body (http://www.youtube.com/watch?v=we7OmwuOHzI). This may be useful when they walk, keeping the head steady most of the time, and then briskly aligning it with the body [1].

[1] Carpenter, RHS (1988). Movements of the Eyes. London: Pion.