A tourist looks at a Monarch butterfly at the El Rosario butterfly sanctuary on a mountain in the Mexican state of Michoacan November 27, 2013. Monarch butterflies have started arriving at a butterfly... more 
A tourist looks at a Monarch butterfly at the El Rosario butterfly sanctuary on a mountain in the Mexican state of Michoacan November 27, 2013. Monarch butterflies have started arriving at a butterfly sanctuary in the central Mexican state of Michoacan - an annual spectacle that draws tourists, scientists and locals alike, but not in the arrival numbers expected. Biologist Felipe Martinez, Sub-Director of the Monarch Butterfly Biosphere Reserve, said the arrival has been delayed due to several cold fronts hitting Mexico and continued rain storms. In 2000, Mexico established a 56,000 hectare reserve for the butterflies in Michoacan and part of the State of Mexico, containing some 6.7 million trees. Picture taken November 27, 2013. REUTERS/Edgard Garrido (MEXICO - Tags: ENVIRONMENT ANIMALS TRAVEL) less 
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Reuters | Photo By EDGARD GARRIDO / REUTERS
Thu, Nov 28, 2013 6:14 PM EST