Michael raupp)-Professor of Entomology, University of Maryland, USA.
What butterflies have to do in rainy days is nothing more than shelter from the rain. For a butterfly weighing only 500 mg, this storm is no small matter: it was hit by a 70 mg raindrop, which may be heavier than two small bowling balls on you and me.
Heavy rain will also hinder the activities of butterflies. In order to prepare for flying, these aerobatics pilots have to let the sun shine directly on their wings, because only in this way can they quickly warm their flying muscles (pterygoid muscles), and cloudy days block the solar radiation necessary for them to take off.
Therefore, when the sky is overcast, butterflies will look for shelter from the rain in their habitats: tall grass or leafy plants that can shelter from the wind and rain. When the sun smiles again, they often return to the blue sky in a few minutes and have fun everywhere.
In addition, if the butterfly is really caught in the rain, you don't have to worry, because the wings of the butterfly are made up of hundreds of tiny scales, which are similar to those of fish. When it rains, it can also block the rain so that they won't really get wet.