The study was one of several that assessed the effects of climate change on three species of butterflies whose populations are declining.

From 2003 to 2019, amateur butterfly enthusiast Harlan Radcliff spent his lunch breaks observing butterflies on the grounds ...

Migrating monarchs live about ten months, summer ones about three weeks. Instead of embarking on their journey north in mid-April as they have for eons, they now leave the mountains of Mexico to the U ...

Given the less frequent sightings, you might’ve wondered: are monarch butterflies endangered, and what can gardeners do to ...

Butterfly Pavilion near Denver is partnering with the Government of Mexico to conserve the winter habitats of monarch ...

The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in the ...

Some of the largest clusters this season were found in Santa Cruz County, with 1,406 monarchs at Lighthouse Field State Beach ...

The monarch butterfly’s dramatic population decline prompted a U.S. Fish and Wildlife’s proposal listing the species as threatened under the Endangered Species Act. If enacted, the ruling would enhanc ...

Millions of western monarchs used to return to coastal California every year, but the population has plummeted in recent ...

ASGA's vice president of science and innovation told sugarbeet growers the potential listing of monarch butterflies as ...