Butterfly mating involves males and females, butterfly usually begins marriage.
Sometimes even before getting out of her pup, the female butterfly has released a very sweet smell.
This smell is called pheromone, designed to invite male butterflies.
Male butterflies tend to come out of their pupil earlier than the female butterfly.
Male butterflies catch the females and are sometimes ready to wait nearby. The male immediately marries the female so the female comes out of her pupil.
Such is the marriage of the butterfly thank.
@dongsheng