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How many millions of monarchs are in a monarch sanctuary?
Scientists don't really know. They estimate that between 10 million and 50 million monarchs are in a hectare.
A hectare is 2.47 acres, about the size of two and a half football fields.
Scientists say monarchs cover 4.61 hectares of forest this winter. How many butterflies are there if:
There are 10 million monarchs per hectare? _______________________
There are 50 million monarchs per hectare? _______________________
What happened in history that caused scientists to raise their estimate from 10 to 50 million monarchs per hectare? Tell the story in your own words.
