Although they had a later start, the 40,800 symbolic monarchs have now passed the real ones. Their migration from Mexico took only 12 hours. You can track their migration every step of the way on the UPS WWW site . On Saturday, volunteers will assemble at the Science Museum of Minnesota's Magnet School. There the butterflies will be prepared for the final leg of their migration.
Viceroy butterflies look exactly like monarchs to the untrained observer.
This toxin carries over to the adult, and predators know to avoid eating monarch butterflies because of this poison. As we track the monarch butterfly migration each spring, we are always concerned about accurate identification. Pull out your field guide to butterflies and make sure you can tell the difference between monarchs and viceroys. First I added up the lower amount of days. Then I added up the higher amount of days.