Dragons are the Barbaric Archipelago's (perhaps even Earth's) second dominant species, a race of powerful reptiles with two distinguishing characteristics: flight and fire generation, although not all dragons have both or either. They are a largely diverse group with many different features, varying throughout all species, and may consist of many orders on a taxonomic level. Most dragons can be tamed and have human companions. They are the main characters in the How to Train Your Dragon franchise.