Monarch Butterfly Migration Fall 2024. As millions of monarch butterflies make their way down the east coast to mexico for the winter, butterfly scientists want people in their flight path to report. As millions of monarch butterflies make their way down the east coast to mexico for the winter, butterfly scientists want people in their flight path to report.

Learn more about the iconic butterfly, conservation efforts, and the annual migration. Daylength and temperature changes influence the movement of the monarch.