National Geographic News, Reporting Your World Daily

Thursday, October 28, 2010

Photo: Proteins Help Monarch Butterflies Find Mexico, Canada


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A couple of monarch butterflies are on a tree at the Monarch Butterfly Biosphere Reserve in central Mexico in November 2007.

Scientists have found genetic hints about how the butterflies use the sun as a compass in their annual migration between Canada and Mexico.

Photograph by Miguel Tovar/AP