Monarch butterfly population plummets 86% in one year in

There were 4.5 million of them in the 1980s. Now there may be fewer than 30,000.

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A Long-Shot Bid to Save the Monarch Butterfly - Outside Online

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Monarch Butterfly 2018 Population Down by 14.8 Percent - The National Wildlife Federation Blog

Why is monarch butterfly migration so important? - Quora

Number of monarch butterflies in Mexico drops, reversing recovery - CBS News

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California Monarch Butterfly Population Down 86 Percent in One Year

Monarch Butterflies are Officially Endangered

Monarch butterfly population plummets 86% in one year in California

California's monarch butterfly population plummets 86% in one year

Monarch butterfly presence in Mexican forests drops 22%, report says - CBS News