Beauty is no protection against predators. Birds often attack inert monarchs at the Mexican roost. Roaming cattle, mice, shrews, and ants also take a toll, as do violent rain- and windstorms. Many casualties also happen on the way north—a journey of slow, grueling flights.

National Geographic - August, 1976

Beauty is no protection against predators. Birds often attack inert monarchs at the Mexican roost. Roaming cattle, mice, shrews, and ants also take a toll, as do violent rain- and windstorms. Many casualties also happen on the way north—a journey of slow, grueling flights.

National Geographic - August, 1976

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