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.

Hermes and Caduceus is the oldest dragon in the Spartan Flight, which lives in an ocean facing cave in the territory of the city-state. Hermes and Caduceus is the self-proclaimed prankster of the group, who tries to keep the peace with laughter and enjoys annoying Cyntherea, or pretty much any other dragon that happens to be in the vicinity when a mood comes upon him. He also has dedicated himself to teaching the younger hatchlings ways to annoy and prank the older dragons, and endears himself to almost everyone he meets. A memorable day was when he stole Cyntherea's mage supplies, then flew several feet over her head, unnoticed, and dumped the lot of it on her head. That had the rest of the Flight roaring with laughter for the next several days. His mate is Medea and Circe.