A study compiled data from more than 76,000 butterfly surveys across the continental U.S. The declines seen in the last 20 ...

A comprehensive study of U.S. butterfly populations shows dramatic declines in most species, but Pacific Northwest ecologists ...

The U.S. Fish and Wildlife Service is opening a second comment period as they work to list the monarch butterfly on the ...

The Trump administration is reopening public comment on a proposed rule that would list the monarch butterfly as threatened ...

The Trump administration said Tuesday that it is reconsidering adding protections to the monarch butterfly as a threatened ...

Butterfly populations are plummeting worldwide, with experts citing habitat loss, pesticides and climate change as key ...

Butterfly populations have dropped by 22% in the United States, according to a new study published Thursday in the journal ...

A new study finds butterfly populations in the US have dropped 22% since 2000 due to pesticides, habitat loss, and climate ...

The population of the eastern monarch butterflies in Mexico doubled this past winter season, according to a WWF survey.

A recent study combining data from more than 76,000 surveys from 35 monitoring programs across the country found butterfly ...