BirdNote: The Eagle Eye
The eye of an eagle is one of the most sensitive of any animal, and may weigh more than the eagle's brain.
The secret to the exceptional vision lies in its retina. The density of rods and cones within a raptor's eye may be five times that of a human's.
As the Golden Eagle rides hot-air thermals high into the air, it can spot even the slightest movement of its favorite prey, a rabbit, over a mile away. Learn more about this far-seeing raptor at Cornell's AllAboutBirds.