Monarch (danaus plexippus)
The Monarch butterfly, also known as the milkweed butterfly, is one of the few that migrate north and south like birds do for winter. Approximately four generations of Monarchs are born in Minnesota each summer and live roughly four weeks; the exception is the last generation of the season which survives about six months. Each fall, members of this last generation of the season migrate, at a rate of up to 80 miles per day and at an altitude of about 400 feet above the ground, to remote mountain areas of central Mexico where they spend the winter in a state of semi-hibernation.
Minnesota Statutes - 1.1497 State Butterfly