Dec. 24, 2013
Monarch butterflies flutter around the globe
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Photo: Yuri Cortez/AFP/Getty Images
Monarch butterflies frequent a field near Earth University in Limon province, Costa Rica, where students from around the world come to study sustainable agricultural sciences.
Read more: Fewer monarch butterflies are becoming 'snowbirds'
In Photos: Fewer monarch butterflies are becoming 'snowbirds'