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

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

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

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

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 ...

"Insect populations commonly fluctuate from year to year," according to the California ... The monarch butterfly was first petitioned to be listed under the federal Endangered Species Act in ...

“Insect populations commonly fluctuate from year to year,” according to the California ... The monarch butterfly was first petitioned to be listed under the federal Endangered Species Act ...

The Western population of the monarch butterfly has reached the second-lowest level recorded since tracking began nearly ...