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Climate change is destroying the winter habitat of Monarch Butterflies
every year at In early November, the city of Michoacán, Mexico hosts one of the world's most impressive natural spectacles. Hundreds of millions of migrating monarch butterflies take up residence in the forested masses of the country's Monarch Butterfly Biosphere Reserve, approximately 100 kilometers west of Mexico City In southern Canada, they hibernate here in winter before spring mating. After flying more than 4,000 kilometers, the butterflies land on the oyamel firs of the Ejido el Rosario region, where they gather for weeks to protect themselves from the wind and cold nights.