Just over 9,000 monarchs were counted in California last winter, the second lowest ever since the annual count began in 1997 ...

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

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

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

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

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

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

Hundreds of volunteers and partners participated in the 28th annual Western Monarch Count by attempting to identify all of ...

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

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

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

The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in ...