While mating the two insects will not move until the process has been completed. It is believed to be thought that butterflies, or witches that took the shape of the butterfly, to steal milk and butter. Slower butterflies probably fly around 5 mph. Some butterfly species do migrate. This is a relatively new discovery among butterlfies and moths.
Most butterflies migrate in one direction, unlike birds who migrate with warm weather.
Butterflies move to a new location and remain there throughout their short life span. Perhaps they migrate to avoid overpopulation, to find a new home when forced out by development, or deforestation, or even due to temperature changes. There are several reasons for migration, but none is known for sure. A few species are able to survive the winter in any stage of their life cycle by hibernating. During this time the insect goes into a period of inactivity.