From the archives of the Pallium:

There are three basic types of dragon. There are three qualifiers which are associated to the three dragon types. These qualifiers refer solely to the the dragons' natures, and not to their physical attributes or appearance. The three qualifiers are:

• Wasp
• Moth
• Grub

Dragons are not natural creatures. They do not breathe. They possess many abilities which are biologically impossible and defy the laws of physics. For instance: they can fly. They can communicate telepathically with one another as well as with humans. Occasionally dragons will crossbreed, as was done in the case of the Earth-bound dragon named Blair. Blair is a dragon of extremely rare qualities: she is blue--a wasp characteristic, but she is also warm-blooded--a moth characteristic. She is smallish in size, similar to the moths, and shares many moth attributes, such as enhanced psionics.