What is the body covering of eagles?

The Body of an eagle is made for flying and for catching prey. To do these things, the body must be light in weight and very strong. It must be light enough to get off the ground and fly high in the air, but strong enough to swoop down on prey and carry it away. To make their bodies lighter in weight, eagles have hollow bones. In some places, there are braces inside the bones to make them stronger (as shown above). But many parts of the bones have nothing inside them them but air. As incredible as it may seem, the entire skeleton of a Bald eagle weighs only a little more than half a pound (272 grams).