Celehiro eggs glow faintly at night. The glow is inversely proportional to the strength of the moonlight. The phase of the moon that appears on the egg is the same phase as the moon when the egg was laid.
Celehiros bear the mark of the moon on their foreheads. This mark matches the phase the moon was in when the Celehiro hatched. A Celehiro whose mark matches the one that was on their egg tend to end up as leaders in their colonies.
During the dark of the moon many colonies of Celehiros flock together, flying intricate patterns in the air. Anthropologists at the SAR Center believe that is part of an ancient Celehiro ritual to bring back the light of the moon.