Not necessarily.
Like many insects, butterflies do not live very long. In some species, the entire life cycle can be completed in a month or two. The adults may live only a week or two. The Mourning Cloak is a granddaddy among butterflies because it overwinters as an adult, and some of these individuals may be 11 months old when sighted the following summer. Other members of the brushfoot family overwinter or hibernate as adults.
Butterfly hibernation boxes were designed to provide overwintering habitat for these butterflies. The little research that has been done on these boxes shows that they are rarely used by butterflies. There are better methods of providing this type of habitat: you can save old wooden fences and trees that are dead or dying, plant trees like river birch with exfoliating bark, and leave old loose siding on outbuildings.
