Monarch Butterfly Migration Spring 2025. Today's announcement revealed that the eastern monarch butterfly population overwintering in mexico is the second smallest on record, with a mere 0.90 hectares occupied, marking a 59.3 percent. This year, observers from various.
How is the isotopes research conducted and what did it reveal about the monarch butterfly migration path? Once spring arrives and temperatures increase, they are able to begin reproducing and migrating north of mexico, laying eggs in the southern united states.