So long, Monarch butterflies? | Culture Collapse Disorder | Scoop.it

Every spring Monarch butterflies fly north from Mexico, and many of them travel through Texas on their 2,000 mile journey to the central and northern United States and Canada.

 

With luck, their grandchildren, or great-grandchildren will fly south for the winter, where they spend the winter at a few sites in Mexico.

 

One of the best ways that conservationists have to measure the overall health of the Monarch butterfly population is by the size of the area they occupy in tight clusters during the winter in Mexico. In the 1990s this area averaged about 15 acres. In the 2000s it was about 9 acres.

 

This winter the Monarchs occupied less than 1.7 acres in Mexico...(click title for more)