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It's March: How Are the Monarchs and the Seasons Changing?

Look at Line Graphs for Clues
It's March, and millions of monarchs are about to take to the sky and begin their journey north. The monarchs will migrate across the continent in response to Earth's seasonal cycles. What triggers their spring migration? Look at these line graphs for clues and make predictions. Then come back next week as we begin to explore the many time-sensitive connections between monarchs and the seasons.