Some birds of prey have such exceptional visual acuity that they can see small animals from thousands of feet in the air. Visual acuity is greatest when an image projects directly onto a small area of the retina that contains no rods but many cones. Some birds of prey have more than one of these areas. The area is called a

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The area of the retina with no rods but many cones, providing the greatest visual acuity, is called the fovea. This is where images are most sharply focused, especially important for birds of prey spotting their targets from great distances.

Some Birds of Prey Have Such Exceptional Visual Acuity That