These are among the estimated 33 million monarchs now overwintering in Mexico. These butterflies must survive winter, migrate north in the spring, and then serve as the seed stock for future generations.
Estela Romero
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| Only 33 Million These are among the estimated 33 million monarchs now overwintering in Mexico. These butterflies must survive winter, migrate north in the spring, and then serve as the seed stock for future generations. Estela Romero
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