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U.S. Fish and Wildlife Service via Flickr under CC BY 2.0 Butterfly populations in the United States have dropped by almost a quarter in the last two decades, according to a new analysis published ...

Two-thirds of studied species declined by more than 10%, the study said. Butterfly populations have dropped by 22% across 554 recorded species in the United States, according to a new study in the ...

The findings revealed that 33% of butterfly species have experienced significant population declines over the past two decades, with 107 out of the 342 species examined losing more than half of ...

SANTA BARBARA COUNTY, Calif. – Butterfly populations across the United States are declining, a trend reflected in the Western monarch butterfly population along the California Coast. A study ...

A fluttering butterfly makes most people smile with delight — a reaction that makes them special among insects. Some people love butterflies so much that, like birders, they look for and count ...