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.

Two headed dragons are a special breed of dragons. They have two necks, two brains, two mouths, but one stomach and one main body. The two heads usually work together, but there are times when they will fight each other, attacking back and forth. They use their sharp teeth and wings to hunt large animals, and rarely eat plants. It is unknown what would happen if a two headed dragon were to mate with a one headed dragon, since it has never occurred. They only mate within their breed.

The day he finally found that bi-colored egg was a happy day for dragon tamer Marcato, for he had seen two-headed dragons before and wanted one to call his own. He named the dragon(s) Paul and Ceph after polycephaly, a rare condition that causes an animal to have two heads. Paul and Ceph are often said to be their own best friends. They rarely fight and consider any other dragon or human to be an outsider, including their tamer. Due in part to this outlook they rarely like to stay in one place for long and enjoy traveling around the world.