An eagle can spot a rabbit from 2 miles away.

Eagles possess some of the most advanced visual systems in the animal kingdom, with visual acuity up to 8 times stronger than that of humans. This incredible sight is largely due to the size of their eyes, which are physically larger than human eyes and occupy roughly 50% of their skull volume. For comparison, human eyes only account for about 5% of our head space.The eagle's retina contains two foveae, which are areas of high-density photoreceptor cells. While humans have one fovea per eye for central vision, the eagle's dual foveae allow them to see both forward and to the side simultaneously with extreme clarity. Their retinas are packed with up to 1 million cones per square millimeter, compared to just 200,000 in humans.Research published in journals like 'Vision Research' explains that eagles can perceive ultraviolet (UV) light. This allows them to see the urine trails of small rodents, which reflect UV light and glow against the ground. This biological 'tracking system' makes it nearly impossible for prey to hide even in dense grass.Furthermore, eagles have a unique ability to rapidly shift focus, acting like a telephoto lens. This is achieved through highly flexible lenses and powerful ciliary muscles that change the lens shape instantly. This combination of high resolution, UV detection, and rapid focusing allows a Golden Eagle to pinpoint a moving rabbit from a distance of 3.2 kilometers.