Every year, one of the most spectacular natural phenomena in Mexico takes place in the forested mountains west of Mexico City. During the fall, colonies of monarch butterflies migrate here from colder northern climates to find warmth and begin their breeding season. These huge flying colonies can contain as many as 20 million monarchs, which make use of air currents to travel as far as 100 nautical miles per day. The monarchs remain in Mexico from around November to March.
Monarch butterflies in Angangueo, Mexico
Today in History
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This park is Superkilen
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Things are looking up
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Summer solstice
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Astoria-Megler Bridge, Oregon
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World Book Day
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Signs of life in the Empty Quarter
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Spring blooms in the Netherlands
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Hey, who’s in charge here?
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Holey moley–it’s National Doughnut Day!
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Row, row, row your gondola
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International Day of the Tropics
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Our Lady of the Rocks
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Celebrating the International Day of Forests
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A day for the dolphins
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Happy St. Patrick’s Day!
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A bridge comes full circle
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A viewer with a view
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Mid-Autumn Festival
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Instant romance
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A cliff-hanging complex of temples
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A little bit of Wonderland in New York City
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Dancing waters of Dubai
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Does this shark have an Irish accent?
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Chestnut-eared aracari in the Pantanal, Brazil
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A bite of ancient history
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Yosemite National Park turns 132
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March of the flowers
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Evidence of human habitation
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A species no longer at risk
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New Year s Eve in Sydney, Australia