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The Monarch Butterfly Biosphere Reserve is a conservation area and World Heritage Site within the wintering grounds of most of the monarch butterflies that migrate from east of the Rocky Mountains for up to 4,000 km south to central Mexico. The reserve is located 100km northwest of Mexico City.
It is estimated that between 60 million and 1 billion butterflies arrive in this area alone any given year.
“It was only later...I learned that monarchs...the winter....
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