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A new analysis shows that the U.S. has lost more than one-fifth of its butterflies in just two decades. @TheConversationUS explains what’s causing the decline, why you should care, and what you can do to help reverse it.

https://theconversation.com/butterflies-declined-by-22-in-just-2-decades-across-the-us-there-are-ways-you-can-help-save-them-251468