'Canary in the cornfield': monarch butterfly may get threatened species status

Mongabay
By Morgan Erickson-DavisSep 8, 2014, 4:51 pm117 ptsTrending
Monarch butterflies were once a common sight throughout the North American heartland. But declines in milkweed – their caterpillars’ only source of food – have led to a 90 percent decline in monarch numbers. Now, the U.S. Fish and Wildlife Service is reviewing a petition that would grant the iconic…

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