The number of monarch butterflies spending winter in the western U.S. dropped dramatically this year, despite moves to extend ...

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

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 ...

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

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

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

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

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

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

The count estimated a winter population of 9,119 monarchs this year as climate change, habitat loss, pesticides and disease ...

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