The number of monarch butterflies spending the winter in the western United States dropped dramatically this year even as ...

This winter, volunteers from the Xerces Society, a nonprofit environmental group, tallied just 9,119 western monarchs — a ...

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

home to the Pacific Grove Monarch Grove Sanctuary, said that while the local tally followed the overall state trend, it was surprising. Just 228 monarch butterflies were counted during the ...

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 ...

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

Overwintering populations of monarch butterflies in California have reached a near all-time low since records began, conservationists announced on Thursday. The ...

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 ...

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

FILE - A butterfly sits on a leaf at Monarch Grove Sanctuary in Pacific Grove, Calif., on Nov. 10, 2021. (AP Photo/Nic Coury, File) ...

A winter count of visiting monarch butterflies found a steep drop from previous years, which has scientists worried about the ...