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 ...

US butterfly populations have declined by 22% since 2000, with 114 species showing significant drops. A study published in Science found insecticides, climate change, and habitat loss are driving ...

Over the past 20 years the U.S. butterfly population has declined 22%, a dramatic loss that has scientists concerned. "The easy number to think about is the total number of butterflies in your yard.

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 ...