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 ...

Each year, millions of monarch butterflies travel thousands of miles across North America to escape the cold and find ...

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

Thogmartin and other researchers have evaluated more than 200 scenarios for restoring greater than 1.3 billion stems of ...

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

A study on painted lady butterflies reveals that their migration patterns are shaped by environmental cues rather than ...

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 ...