Dragons are creatures with nearly unlimited life spans. They can survive for long periods of time, and no one has found a dragon that has died of old age. Adolescence is usually marked by the growth of a hatchling's wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. Once they hit adolescence, hatchlings change quickly, maturing to their full forms in only 2 years.

Dragons don't communicate with each other verbally, but they will growl to scare off predators and frighten prey. Young dragons will emit an extremely high-pitched squeal when they are frightened. To communicate, they use telepathy with each other and to speak to other creatures.

Stone dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

If met first time, Stone Tail looks dangerous and combative. However, anyone who knows him better, knows that he is nice and really friendly, and "aggressive" just like a white lamb.

His egg, abandoned just after it has been laid, has been in the cave for really long period of time. One of female dragons flying around the cave, Julie, took care of the egg. When Stone Tail hatched, she taught him to be different than other, aggressive dragons living in the mountains.