Good night all.
The way butterflies cross-pollinate plants in the same way as other insects. Move from tree to tree with flower powder on their feathery feet. After sucking the nectar from the flower, the pollen powder may be attached to the butterfly body after moving to pick up the nectar again the pollen powder will stick to the pistil and will change into fruit or seed of the plant. This is the only information I can share with you.
##FOLLOW ME @saiful