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.

Crudely carved into the rock beside this passageway and accentuated by soot of fireblast are the words, "Draconian Dioxide and Cobaltide Dioxide, Chemists". As you step into the passageway, the acrid smell of burnt material, chemicals and, oddly enough, lots of paper, assaults your nose. You enter a roughly carved balcony- Below you, over the railing, you can hear a dragon's flame, and the sounds of writing, but that's not very important, considering you just walked into Cobaltide Dioxide, who's latest experiment seems to have not gone well, considering the smoking tips of his horns and the angry burnt patch on both snouts.  His red eyes glare at you, but since you don't appear to be doing anything more than looking, he leaves you alone and vanishes into a room to your left that is filled with paper-Lab reports, probably.