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

People in northern climates are familiar with flocks of birds flying south in the winter, but why do they do it, and why ...

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

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

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

The main basis for the proposal to list monarchs as threatened is that researchers are seeing fewer of the butterflies each year at their overwintering sites. There’s little debate that the monarch’s ...

the migration of the monarch butterfly. The two will lead an effort to restore winter grounds for the butterflies in Mexico’s Butterfly Biosphere Reserve in a newly funded project, they ...

On Thursday, invertebrate conservation group the Xerxes Society released the results of their 28th annual Western Monarch ...

On Thursday, the Xerces Society released the results of its 28th annual Western Monarch Count, reporting the second lowest overwintering population ever recorded since tracking began in 1997. This ...

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

The monarch butterfly's ancestral home in North America is noted for an annual mass migration and spectacular ... adults congregate on trees throughout winter. In Australia, the late entomologist ...

Western Monarch Count observed a peak population of 9,119 Monarch butterflies in California this winter, marking a sharp decline in the last few years. The count, administered by ...