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.

Vahus was the first male two-headed dragon to enter the cave, and as a result, has had three different female two-headed dragons to choose from.  He's fair and honest, and above all noble, though, and thus has mated for life with his choice, Headaches.  He's definitely the head of the two, asserting his dominance, but being just and respectful of his mate as well.  Because of this nature, he is considered wise and often sought out for advice and a new perspective on a tough problem.  He's also considered by many to be the cave's judge and jury, policing the ill actions of the others and making sure that everyone maintains a peaceful life with one another inside the cave.