The number of monarchs down in Mexico

MEXICO CITY – The number of monarch butterflies that spend the winter in Mexico fell by 28.1 percent this year, according to a report released Thursday.

The report, conducted by the World Wildlife Fund (WWF), private donors and the Mexican National Commission on Protected Areas, indicates that monarchs cover 2.89 hectares of forest this year, compared with 4 hectares last year and 4.7 hectares in 2010.

This decrease in the number of monarchs is partly due to drought that affected parts of the United States and Canada where butterflies breed. According to experts, the deforestation of the region where the monarchs spend the winter, west of Mexico City, also explains the decrease.

The experts became concerned two years ago, when the number of butterflies come to spend the winter in Mexico fell 75 percent, the lowest level since 1993.

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