by Mary Emich, Assistant Biologist

Over the last decade, the monarch butterfly, Danaus plexippus, population has declined. Climate change has affected weather conditions, the winters are colder and wetter while the summers are hot and drier. This disturbs their survival rate, especially during their long annual migration. Other factors like pesticides and a loss of habitat to human development further threaten the monarch population.

The monarch butterfly migration is mysterious and magnificent. Every fall season, monarch butterflies travel thousands of miles from their breeding grounds in the United States and Canada to escape the cold winters. Monarchs in Eastern North America spend the winter months in the Transverse Neo-Volcanic Mountain Range in Michoacan, Mexico. To reach their destination, monarch butterflies migrate over 3,000 miles, utilizing the air currents and making many stops along the way.