Moths need to be levelled up to increase their coin yield. To level up a moth, you need to raise and hatch your moth, and feed it the required amount of pollen it needs to turn the wing gold. The progress bar will indicate how much pollen is needed for this :) Each moth species must be fused 5 times to add each of the 4 wings to your moth. Pollen is produced by pollen flowers. Simply tap a moth and drag it with your finger through the pollen to collect it!