Eagles could see Ultraviolet light, reflected from its prey at a far distance of about 2 miles away. But, they could not identify /differentiate what the color is and how they are formed, which is one of the amazing facts about animals/birds – Eagle.
The reason behind this vision is, their retinas are densely coated with cones (light detecting cells) equalizing the high pixel resolving cameras.
They also have fovea in the back of their eyes like humans, which detects light from the center of visual field. Eagles have convex pit fovea (while in humans, fovea is shell or bowl like) that allows their eyes to act like telephoto lens.
This telephoto lens gives extra magnification at the center of eye’s field of view.
Eagles could spot any animal in the size of a rabbit from two miles away, with their most powerful eyes.
During prey’s attack, Eagle adjusts the curvature of eyeballs and maintains sharp and accurate perception throughout continuous approach and attack.
Unlike humans (identifies three distinct colors), Eagles could identify five distinct colors and can able to identify prey even if they are hidden.
Eagle’s eyesight is found as 4 to 8 times stronger than average human eyesight.
Sometimes sharp-sighted people also referred as “eagle-eyed” persons.
Besides this, Eagles fly above the cloud during rainy days, where other birds find their nests for accommodation.