monarch butterflyMonarch butterfly colonies in Mexico more than doubled in size this winter after bad storms devastated their numbers a year ago, conservationists said on Monday.

Butterfly colonies increased by 109 percent this year to cover roughly 10 acres of forest.

Harsh weather can endanger populations of butterflies in any year, as they make their annual 2000-mile migration southward from US and Canada.

(READ the story from Reuters)

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