Once, millions of monarchs wintered in California. But climate change, habitat loss, widespread pesticide use and disease ...

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

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

SAN DIEGO, Calif.— After nearly 30 years of petitions and lawsuits by the Center for Biological Diversity, the U.S. Fish and Wildlife Service today protected one of Southern California’s rarest ...

The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as threatened species and designate seven ...

Much of California’s Habitat for the migratory Monarch butterfly is gone. Wild fires have decimated groves of trees and plants where the Western Monarch winters. The typical flight plan of the Monarch ...

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 ...

Monarch butterflies have an innate ability to navigate long distances ... Similarly, monarchs on the West Coast often migrate ...

The number of monarch butterflies in California is in sharp decline this year. This is the second-lowest population recording ...

The natural phenomenon of the iconic monarch butterflies migrating south for the winter is a fascinating one - and it's one that's under threat.

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