Saving the monarch butterfly—biologist explains population census discrepancies
Thursday, August 3, 2017 - 05:02
in Biology & Nature
Monarch butterfly populations have taken a nosedive over the last 20 years, according to researchers who monitor the number of butterflies that spend the winter in Mexico every year. But organizations of citizen scientists in the United States who conduct yearly censuses of monarchs in state parks and other locations in the summer have reported no consistent dip in the number of butterflies they see.