Only 40 years after one of the most fabulous discoveries in history, the hibernation sites of the Monarch butterfly, their populations have diminished drastically.

Over the last decade, Monarch butterfly populations have diminished drastically in North America until reaching, in 2013, their lowest number of the entire decade. This decrease reflects deterioration in the quality of the environment in vast areas of the continent and has grave ecological and economic consequences. Due to the complex migratory phenomenon, the recovery of Monarch butterflies and of the environmental quality of North America is the responsibility of all of the citizens of Canada, the United States and Mexico.