How does a wall lizard break off its tail ?

The wall lizard is able to break off or detach its tail whenever it wants. The bones of the tail are joined loosely so it separates easily. When it separates it does not lose much blood because the ends of the blood vessels are sealed. In a few days the tail grows back in place.

The lizard detaches its tail when it is attacked by its enemies. The broken tail keeps wriggling for some time. This startles and confuses the enemy. In the meantime the lizard escapes. This technique thus helps the lizard in its protection.