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.

Runningdeer was found in a large field. He was an egg, and it was obvious there had been other terrae dragons there, for the tops of the surrounding trees were stripped bare. There were also other eggs, so his and other mothers must have had to leave them.  In his youth, he was fascinated by deer and enjoyed running with them.  He would try to eat grass or fallen leaves, but he looked up at the tops of the trees and soon learned to climb and after that, fly.  He still runs with the deer, and many have commented seeing a herd of deer with a large, green object in the middle of it.