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Monarch Butterflies Mexico Migration Dropped This Year http://apocadocs.com/s.pl?1331926125
The number of Monarch butterflies wintering in Mexico dropped 28 percent this year, according to a report released Thursday, a decline some experts attribute to droughts in parts of the United States and Canada where the butterflies breed and begin their long migration south.
Others say damage to wintering grounds in central Mexico's mountains remains a factor in the decline, citing deforestation of the fir and pine forests they favor.
The numbers of butterflies spending the winter in Mexico have varied wildly in recent years.
Concern rose two years ago, when their numbers dropped by 75 percent in the wintering grounds, the lowest level since comparable record-keeping began in 1993. They partially recovered last year, when the number of butterflies nearly doubled from that record low point.
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[Read more stories about:
migration changes, drought, sixth extinction]
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'Doc Michael says:
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Democracy butterflies are doing fine.
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