Lepidoptera glided through a thin layer of fog, weaving carefully around tall stony crags. He closed four of his six eyes, simultaneously resting and watching where he was going. Sleeping while flying was dangerous, but he had practice. He flew just below the Areattl cloud city, in the lower levels of the mountains, which was pervaded by an omnipresent layer of fog. After some distance, he found what he was looking for, a particularly tall crag of stone that stood out from the other mountain formations. The tip of the stone disappeared high into the clouds. He glided up as high as he could manage, perching on the side of the spire and climbing onto a narrow ledge just large enough for him. Settling onto his haunches, he looked out at the foggy landscape.