The Butterfly Project transforms Drexel Park with colorful designs by local students, symbolizing recovery and hope.

In a discovery that brings a legendary quantum theory to life, physicists at Princeton University have directly observed ...

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 ...

We found declines in just about every region of the continental U.S. and across almost all butterfly species. Overall, nearly one-third of the 342 butterfly species we were able to study declined ...

Researchers compiled data on more than five hundred butterfly species across the United States from 2000 to 2020. Some species are faring better than others, but overall, butterfly numbers dropped ...

The study, published Thursday in the journal Science, is the most comprehensive tally of U.S. butterfly populations to date. Nick Haddad, a Michigan State University ecologist who co-wrote the ...

Still, researchers didn’t have enough data to include some of the most imperiled butterfly species, which probably experienced some of the steepest declines. And the data was quite likely biased ...