In encouraging news, the eastern monarch butterfly population nearly doubled in 2025, according to a new report announced in Mexico. The population wintering in central Mexico's forests occupied 4.42 ...

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 ...

On the men’s side, there is the 800-meter freestyle standard of China’s Zhang Lin, who clocked 7:32.12 at the 2009 World Championships. On the women’s side, there is the 200 butterfly mark ...

Even the invasive white cabbage butterfly, “a species that is well adapted to invade the world,” according to Haddad, fell by 50%. Cornell University butterfly expert Anurag Agrawal said he ...

Butterfly populations have dropped by 22% across ... according to a survey released Thursday by the World Wildlife Fund in Mexico and Mexico's National Commission of Protected Natural Areas.

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 ...

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 ... This large-scale decrease in the number of insects in the world is a threat not just to ecosystems but also agriculture.

We found declines in just about every region of the continental U.S. and across almost all butterfly species ... and rate of biodiversity loss in the world right now can make one feel helpless.

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 ...

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 ...

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 ...