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The number of monarch butterflies flying to Mexico's Monarch Butterfly Biosphere Reserve during their 2011-2012 migration will be greater than in the two previous seasons showing a "partial recovery" after a massive kill-off in 2009-10.
16 February 2011
MEXICO: Monarch Butterflies Migration Shows "Partial Recovery" From 2009-10 Low Point.
The number of monarch butterflies flying to Mexico's Monarch Butterfly Biosphere Reserve during their 2011-2012 migration will be greater than in the two previous seasons showing a "partial recovery" after a massive kill-off in 2009-10.
