North American monarch populations have decreased drastically over the last decade, and are threatened by habitat destruction in all parts of their range, and a changing climate. The Sonoran Desert region plays a role in monarch migration, and residents are fortunate to be able to see them. However, much is still not known about monarchs in Arizona and information about these butterflies in northern Mexico is scant. In an effort to reverse its decline and restore healthy populations throughout North America, this amazing insect has brought together the governments, scientists, and citizens of three nations.