The monarch butterfly may be the most recognized butterfly in the world. With the exception of the Polar Regions, the medium-size butterflies can be found on every continent on Earth. Their spectacular migration in eastern North America, from breeding locations in Canada and the United States to overwintering sites in Mexico, is nothing short of a miracle and has been the subject of decades of study.
Monarchs have four life stages; egg, larva (caterpillar), pupa, and adult (butterfly). The search for milkweed, the only food that monarch larvae eat, is the sole reason for the annual monarch migration. » Continue Reading.