This egg was only available in Egg Cave's Cash Shop Park for September 2012.
Flyen eggs produce very small electrical beams that heat the egg's outer shell to maintain internal conditions.
Most people believe Flyen to be an other-worldly species. They are often referred to as the "Flyen Fairies" because their movements and facial expressions resemble that of Ark fairies.
Good luck catching a Flyen! It's next to impossible to achieve.