Terrae Dragons are primarily herbivores who prefer to eat from the tops of trees. However, due to their massive size, they must rely on small, specialized scales to absorb and convert energy from the sun. Since they live in tightly-knit groups, this form of energy absorption helps preserve the forests in which these dragons reside.

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.

Lorax was born with the unique ability to understand and speak with forests. According to him, the rustling of trees is their way of communicating. As a hatchling, no one believed his ramblings. One day, Lorax cried out to his cavemates in despair, that the trees of the forest were in pain and dying. But it fell on everyone's deaf ears.

It was not until a year later that they noticed something was terribly wrong. Long before the dormancy of fall, leaves were discoloring and falling. Finally, turning to listen to the young Terrae, they heard him speak of pale creatures that the trees described as dumping logs, brimmed with a mysterious neon green water. Since then, the cave has been monitoring the health of their forest carefully through Lorax's amazing gift and has prevented further of these creatures from entering.