The iconic monarch butterfly is declining across North America. You can help make a difference by providing the species with ...

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

Are monarch butterflies endangered? Monarch population numbers are falling and it's clear that these butterflies need our ...

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

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

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

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

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 ...

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