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 ...

An SFA Gardens program delayed because of a winter storm in January has been reset for March.

Monarchs are among the most recognizable and best loved butterflies in North America, but you might have noticed fewer of ...

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

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

Newly released data shows that the number of monarch butterflies migrating to California this winter is near-record low. "We ...

The Ellwood Mesa Butterfly Grove used to be California's largest wintering site for monarch butterflies, but in 2024, only 30 butterflies were counted.

The count of 9,119 butterflies this winter is a sharp decline from 200,000 reported in the past three years, but slightly up from 2,000 monarch reported in 2020.

Just over 9,000 monarchs were counted in California last winter, the second lowest ever since the annual count began in 1997 ...