I read in an article that birds bob their heads while walking because they eyes do not have an overlapping FOV.
I have no idea what that means.
In: Biology
Field of view is what your eyes can see without turning your head.
Human eyes are on the front of the head. You can close either eye and still see an object in front of you well: your eyes’ fields of view overlap. With both eyes open you get more clarity and depth perception. However you don’t see objects to your side all that well, and can’t see behind you.
Many herbivorous and smaller omnivorous animals have eyes on the sides of their head. This gives their eyes more coverage to the sides and back – a huge field of view, but they barely see what’s in front. It’s just at the edge of either eye, or they have to turn their head to look forward with just one eye – you can often see birds like chickens or pigeons turn their head to study something.
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