I really LIKE Michael Lidberg's work but it is the titles and description that make me LOVE it.
Every year the ancient moa travel to the Upper Realm to enjoy the delicacy of two-headed lava worms. One day in spring, the two headed lava worms rise to the surface to mate. The moa take advantage of this opportunity gladly and gain their rich golden color from a unique protein found in the worms. After eating their fill, moa quickly descend back to the Middle Realm where it is much cooler.