Hunting birds have keen eyes that enable them to make perfect distance
adjustments while they attack their prey. In addition their large eyes contain more vision
cells, which means better sight. There are more than one million vision cells in the eye
of a hunting bird.
Eagles that fly at thousands of meters high have such sharp eyes that
they can scan the earth perfectly at that distance. Just as war planes detect their
targets from thousands of meters away, so do eagles spot their prey, perceiving the
slightest colour shift or the slightest movement on the earth. The eagle’s eye has an
angle of vision of three hundred degrees and it can magnify a given image around six to
eight times. Eagles can scan an area of 30,000 hectares while flying 4,500
meters above it. They can easily distinguish a rabbit hidden among grasses from an
altitude of 1,500 meters. It is evident that this extraordinary eye
structure of the eagle is specially designed for this creature.