Each Fever Wyvern carries a unique and very deadly disease on the spines of its tail. To make up for a lack of physical strength, the dragons use this disease to their advantage by poisoning prey and fending off attackers. The illness will quickly render victims helpless before eventually killing them. A Fever will track its prey until the target can no longer move. Usually a solitary breed, these dragons will only come together during mating season, and will flare out the brightly colored sails along their wings to help attract potential mates. Although it has been observed that the wyverns are nocturnal, they will often pick an open spot of sunshine to curl up in and sleep as the day passes by.

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.

To the unscrupulous eye, nothing about this female's love life is unusual. She spends most of the year by herself, congregates with males during the breeding season, chooses a mate, and then parts ways with him after the young are reared. Yet the more observant will realize that, time and again, she is choosing the exact same male, irregardless of the strength of his displays, and that they spend a good deal more time together than expected. Often the pair can be found looking up at the stars together, speaking in the sibilant whispers of their kind, tails and bodies intertwined. What this might imply--if it implies anything at all--is uncertain, but it can be noted that even when she's apart from her mate she often looks at the stars, mournful, wings shivering as if looking for something to embrace.