In 2023, more than 16,000 butterflies were counted at one local grove. The most recent count was a tiny fraction of that.

The Western population of the monarch butterfly hit a near-record low with fewer than 10,000 found living in California this ...

As I watched the California wildfires burn out of control last month, I couldn’t stop thinking about all of the victims of ...

Scientists are grappling with a stark population decline of the western monarch butterfly after the species’ numbers hit a ...

On Thursday, the Xerces Society released the results of its 28th annual Western Monarch Count, reporting the second lowest overwintering population ever recorded since tracking began in 1997. This ...

Monarch butterfly numbers at Pismo Grove have dropped significantly this year, according to the nonprofit Xerces Society’s ...

On Thursday, invertebrate conservation group the Xerxes Society released the results of their 28th annual Western Monarch ...

Five butterfly species in the United States have gone extinct since 1950, and dozens more are on the verge of extinction according to the Xerces Society for Invertebrate Conservation.

NEW YORK, Jan. 31 (Xinhua) -- The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in U.S. California this winter, a foreboding sign ...

Western Monarch Count observed a peak population of 9,119 Monarch butterflies in California this winter, marking a sharp decline in the last few years. The count, administered by ...

Western Monarch Butterflies have reached record low numbers along the Central Coast, according to the U.S. Fish and Wildlife Service.

California's monarch butterflies are hanging on. But experts say severe winter storms likely led to a decline in this year's count.