Nebula Dragons are nocturnal creatures. With the best eyesight to be found, they are often seen staring into space. Each dragon tends to observe a particular nebula and will eventually change their colors and patterns to match it. As the nebula changes over time, the dragon changes with it. The more intricate the design of the nebula, the better chance an individual has of attracting a mate. It is said that the markings on no two Nebula Dragons will be exactly the same.

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.

Movie is always very concerned for the innocence of hatchlings. Whenever a hatchling is near, she will make sure to know exactly how old the lil' one is and if his or her parent is nearby. She has very clear rules which kind of language is appropriate in the presence of eggs, freshly hatched wyrmlings, or hatchlings whose wings have grown in. She uses "shucks" or "darn" or "heck" when she gets agitated, only resulting in the hatchlings giggling their little behinds off. While most parents appreciate her thoughtfulness in general, they shake their heads about some of the stuff she censors because they can't really see what should be bad about a hatchling knowing where eggs come from or them witnessing the killing of prey.