Green Dragons are also sometimes called “earth” dragons. They usually live deep within caves, and have power over the earth. They are capable of launching boulders at high speeds, and can cause earthquakes by slamming down onto the ground.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons 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. In Galsreim, dragons and humans coexist peacefully.

Changle is one of those dragons that's fascinated by humankind. In his case that fascination took the form of learning as much as he could about dragon and rider cooperation. Though (like all the members of Ferwe Weyr) he doesn't have a humankind partner, when the weyr made contact with humankind and mixed dragon and humankind communities Changle became much in demand for training dragonriders, ridden dragons, and partnerships.