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This butterfly was the first to go extinct in the US because of humans CNN 3 hrs ago By Ashley Strickland, CNN © Courtesy Field Museum This 93-year-old Xerces blue butterfly specimen was used in a study to prove it was once a unique species. As the first North American insect to go extinct due to humans, a blue butterfly has become an icon for insect conservation and what happens when humans destroy habitats without thought for the creatures living in them. The last of the Xerces blue butterflies fluttered through the air in San Francisco in the early 1940s. Now, they can only be seen in glass displays at museums.

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