Image of the Day: Monarch’s Mexico Migration Minimizes

The number of Monarch butterflies spending their winters in Mexico dropped 28 percent, according to a new report. The reason for the decline in Monarchs flying south is up for debate. Some scientists say that the decline is due to drought conditions in the U.S. and Canada where the butterflies breed and start their journey south. Other experts say it’s the deforestation of fir trees in Mexico’s mountains that’s at the root of the butterflies’ declining numbers.  

 

Credit: Sally Rae Kimmel/flickr