What did the small snakes sacred to Zeus have that was distinctive?

The small snakes sacred to Zeus, often referred to as "sacred serpents," were distinctive for their unique coloration and markings, typically featuring vibrant hues that set them apart from ordinary snakes. Additionally, they were believed to possess a divine significance, symbolizing power and protection associated with the god. These snakes were often depicted in ancient art and mythology as companions or symbols of Zeus's authority.