A bird skeleton is a lightweight framework that supports a bird's body while allowing for flight. It is made up of hollow bones, which reduce weight without sacrificing strength. This unique structure helps birds achieve the necessary lift and maneuverability in the air. The bird skeleton consists of various parts, including the skull, vertebrae, ribs, and limb bones. The wing bones are specially adapted for flight, while the keel on the breastbone provides an anchor for powerful flight muscles. Overall, the design of a bird's skeleton is crucial for its ability to soar and navigate through the skies.