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.

Monarch butterflies down over a quarter in one year

Giant Butterfly Study Unlocks The Monarch's Most Mysterious Traits

California Monarch Butterfly Population Down 86 Percent in One Year

Monarch butterfly population going down – DW – 03/06/2018

Overwintering Numbers for Western Monarch Migration Alarmingly Down

TIME for Kids Saving Monarchs

TIME for Kids Saving Monarchs

Monarch butterfly population up 144 percent on wintering grounds

Art Shapiro: California's Monarchs 'on Life Support' - Bug Squad - ANR Blogs

A Balcony View of Near-Extinction

With 86% Drop, California's Monarch Butterfly Population Hits Record Low - The New York Times