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Too Cold to Fly? The Effects of Temperature on Fall Migration

This slideshow tells a story of discovery. Students learn that scientists did not know about the monarch's winter home in Mexico until 1975. Scientists discovered that monarchs migrate each fall to an astonishingly small region in Mexico that measures only 73 miles wide. Within it, the monarchs gather on only 12 mountain sanctuaries where they cluster in colonies by the tens of millions. These mountain sanctuaries provide the unique conditions monarchs need to survive the winter, from November until mid-March. Use this story as a springboard to explore the essential question:

Essential Question
What conditions make the monarch's overwintering habitat in Mexico ideal for survival?


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