A Dry, Dusty Trip into the Monarch Sanctuary
"Basically the entire mountainside is as dry as a bone at this time of year," says Dr. Bill Calvert. The mountains are volcanic, and the volcanic dust is as fine as baby powder. People often cover their faces with a bandana so they can breathe. Images courtesy of Dr. Lincoln Brower.
![Monarch Butterflies burst from colony. Michoacan, Mexico](https://s3.us-east-2.amazonaws.com/journeynorth.org/images/graphics/monarch/lpb/LPB.1305.jpg)
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