Measuring the Population in Mexico How Many Monarchs? How Many Monarchs? Measuring the Area Covered With Monarchs Measuring the Area Covered With Monarchs Identifying Trees in the Colony Identifying Trees in the Colony Measuring the Perimeter of the Colony Measuring the Perimeter of the Colony Area Occupied Area Occupied Total Area of 12 Sanctuaries Total Area of 12 Sanctuaries Measuring During Cold Temperatures Measuring During Cold Temperatures Historic Population Data Historic Population Data Companion Resources Journal Photo Gallery Text Teaching Resources Driving Question Why is it important to collect and analyze monarch population data from year to year?
