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.

According to most sane (and some insane) dragons, Rabid Twoface is one of the most extreme cases of split personality disorder that the land has ever seen. Sometimes, he stands at the front of the cave for hours at a time, blocking the cave while his two heads argue over which way to go. This also impacts Rabid Twoface's abilities; he tends to fight with himself during a battle against intruders, or make so much noise quarrelling that he scares off all the prey.

Because of his split personality, however, he's very good at seeing things from different points of view, and this often benefits Rabid Sea Breeze, the leader of the Rabid Ones, if he ever needs advice on making a decision. When he can't make up his mind, Sea Breeze presents the issue to Twoface, who promptly begins to argue over it. This helps Sea Breeze make decisions, which is the only reason he even keeps Twoface around other than pity; the way Rabid Twoface behaves, he'll find it hard to live on his own.