Most birds which forage for food like chicken and the shore birds have their two eyes set on the two sides

of their head. Each of the eyes can see a different scene at the same time.

The resulting field of vision allows them to spot any danger from any direction.

But they can’t judge the distances correctly since they lack the stereoscopic vision.

Shore birds like sandpipers make up for this defect in an ingenious way.

They bob their head up and down and also in sideways and view the object from several angles. This helps

the birds to assess the distances better.