Back Start Next

Millions of Monarchs in Mexico
Monarchs migrate to Mexico from across eastern North America. They cluster by the millions in just 12 mountain sanctuaries. The butterflies gather in one small region of Mexico. This gives scientists a chance to measure the size of the entire migratory population. How do you suppose scientists count so many butterflies?

Photo: Elizabeth Howard

Journey North Home Page   Pinterest Facebook   Annenberg Media Home Page
Copyright 1997-2014 Journey North. All Rights Reserved.   Contact Us    Search