Firstly, it’s important to know that monarch butterflies cannot survive freezing temperatures, so they migrate to warmer ...

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 ...

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

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

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

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

At a festival last September in Minneapolis meant to celebrate the monarch butterflies' migration before winter, some monarch enthusiasts noted that the insects' prevalence seemed to have dwindled ...

Before National Geographic published its famous August 1976 cover story detailing the search for the monarch butterfly ... the winter in central Mexico, while those in the west migrate to ...

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