Iconic monarch butterflies could soon be extinct in North America's west: "In the 1980s, 10 million monarchs spent the winter in coastal California," says lead researcher Cheryl Schultz from Washington State University Vancouver. "Today there are barely 300,000."

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Iconic monarch butterflies could soon be extinct in North America's west: "In the 1980s, 10 million monarchs spent the winter in coastal California," says lead researcher Cheryl Schultz from Washington State University Vancouver. "Today there are barely 300,000."