Population of Monarch butterflies crashes across North America | West Central Tribune
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Population of Monarch butterflies crashes across North America

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BROOKLYN PARK, Minn. — Minnesota's state butterfly is elusive.

Scientists say the population of Monarch butterflies has crashed because of extreme weather in southern states. The butterflies migrate north from Mexico as the weather warms during the summer and leave by about mid-August. Experts say Monarchs need a temperature of 55 degrees to fly.

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