This species emmigrates each year looking for adequate climates for its survival. In two months it travels 4,800 kms until reaching the zone of Angangueo, Michoacan, which becomes the winter quarters of 13 million butterflies. During their stay they hibernate upon the pine trees, eating up their fat reserves and when the sun begins to warm in February-March, they mate and start to go back. Some make it back north, but the majority are the new generations born on the way which will live in U.S.A and Canada. Their immigration flight is done in groups developing an average speed of 15 kms per hour, while the return is done dispersely. It is in Angangueo only where the Monarch lives in a colony, in the U.S.A. and in Canada they disperse looking for asclepias (their main food).