Morhethalon eggs can be spotted in the Grasslands of Ark. The hearts on the egg will eventually become the antenna of the hatched creature.
Morhethalons are a vital part of the Grasslands ecosystem. Their most notable function is cross pollinating and how efficient they are at doing so. There are two reasons why they're so good at this. First, they have some of the largest wings for butterfly creatures which carries more pollen. Second, their wings have a specific type of hair that is great at trapping pollen and keeping it stuck to their wings. (This pollen doesn't easily blow away or wash off.)
Without Morhethalons, it's thought that the Grasslands ecosystem might collapse entirely.