Structural adaptation refers to the changes in the structure of a living organism that enables it to adapt better to its environment. These are special physical features of an organism, such as the bill on a bird or the fur on a bear, that help them survive in their natural habitat. Structural adaptations can consist of special body parts, skin, color, and shape. Examples of structural adaptations include blubber in penguins to protect themselves from freezing temperatures and the long neck of giraffes to reach leaves high up in trees. Structural adaptations are the result of evolution, which is a change in a species over long periods of time.