Aside from Giant Eagles, the Eagle is the largest bird in the world. It can weigh up to 20 pounds and have a wingspan of up to 7 to 8 feet from wingtip to wingtip. In addition to their size, the eagles are further distinguished by their sharp, heavy beaks (which end in a downward-sloping point) and four big talons on each foot. These birds have the exceptional vision that ranks among the best in the animal kingdom. First, an eagle can see four to eight times farther than the average human, allowing it to spot small prey from up to two miles away, even while in flight. Second, it can also see in a wider range of colors, including ultraviolet. Finally, it can shift focus quickly to zoom in on prey.