Monarch butterfly populations in the west are down an order of magnitude from last year
The species' western population may face "migratory collapse."
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Resources
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How Does a Caterpillar Turn into a Butterfly? | Scientific American
To become a butterfly, a caterpillar first digests itself. But certain groups of cells survive, turning the soup into eyes, wings, antennae and oth...
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With 86% Drop, California’s Monarch Butterfly Population Hits Record Low - The New York Times
The monarchs’ declining wintertime numbers are “potentially catastrophic,” according to the nonprofit conservation group that conducted the count.
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Monarch Butterfly Numbers Keep Declining
(Beyond Pesticides, March 14, 2018) The annual count of Monarch butterflies overwintering in Mexico shows declines from last year’s numbers—a 15 pe...
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