Swallowtail Dragons are graceful and quick flyers, much like their namesake bird. They are capable of precise aerial acrobatics, and can reach very high altitudes. Because of this, humans observing these dragons are often astonished at how large they are when confronted up close. A Swallowtail’s diet consists of insects and small mammals plentiful in temperate forests. These dragons are also made remarkable by their paper-thin wing membranes, which allow light to pass through, creating an astonishing effect on starry nights.

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.

Butterflight's name originated from the word "Butterfly", of which there is a species called a Swallowtail butterfly. In all, he is the average Swallowtail dragon, in personality and actions. He doesn't talk much, but keeps to the sky, twirling, spinning, diving, and loop-da-looping below the clouds. Other dragons in the pack are not fond of him, for they think that he is trying to show off--though in reality, he's simply trying to enjoy himself. He's often seen following the leader, the firstborn dragon of his owner's herd, Zemimorth, the elder whom all the dragons look up to. As snacks, he prefers large, juicy dragonflies or very small animals he can snatch up and swallow in a single gulp.